Answer The solutions are x = 3 , 4 and the factorization method is preferable. Explanation Given information: The quadratic equation: − 2 x 2 + 12 x − 17 = 2 x 2 − 16 x + 31 Calculation: The given equation is − 2 x 2 + 12 x − 17 = 2 x 2 − 16 x + 31 . Rewrite the given equation as: − 2 x 2 + 12 x − 17 = 2 x 2 − 16 x + 31 2 x 2 − 16 x + 31 + 2 x 2 − 12 x + 17 = 0 4 x 2 4 − 7 28 x 4 + 12 48 4 = 0 4 x 2 − 7 x + 12 = 0 The above equation can be solved by two different ways which are graphically or by factorization. Graphical method: The graph of the above expression is shown below: From the above graph it is seen that the curve intersects the x -axis at the points ( 3 , 0 ) and ( 4 , 0 ) . Thus, the solutions of the given equation are x = 3 , 4 . Factorization method: x 2 − 7 x + 12 = 0 To solve the equation by factorization, split the middle term of the equation. x 2 − 7 x + 12 = 0 x 2 − 3 x − 4 x + 12 = 0 x ( x − 3 ) − 4 ( x − 3 ) = 0 ( x − 3 ) ( x − 4 ) = 0 Solve the factors for x . x − 3 = 0 x = 3 And, x − 4 = 0 x = 4 Thus, the solutions of the equation are x = 3 , 4 . The factorization method of solving the equation is preferable. Hence, the solutions are x = 3 , 4 and the factorization method is preferable.

Big Ideas Math A Bridge To Success Algebra 2: Student Edition 2015

1st Edition

ISBN: 9781680331165

Author: HOUGHTON MIFFLIN HARCOURT

Publisher: Houghton Mifflin Harcourt

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Question

Chapter 3.5, Problem 55E

To determine

To determine: The two different ways to solve the quadratic equation.

Expert Solution & Answer

Answer to Problem 55E

The solutions are x=3,4 and the factorization method is preferable.

Explanation of Solution

Given information:

The quadratic equation: −2x2+12x−17=2x2−16x+31

Calculation:

The given equation is −2x2+12x−17=2x2−16x+31 .

Rewrite the given equation as:

−2x2+12x−17=2x2−16x+312x2−16x+31+2x2−12x+17=04x24−728x4+12484=04x2−7x+12=0

The above equation can be solved by two different ways which are graphically or by factorization.

Graphical method:

The graph of the above expression is shown below:

Big Ideas Math A Bridge To Success Algebra 2: Student Edition 2015, Chapter 3.5, Problem 55E

From the above graph it is seen that the curve intersects the x -axis at the points (3,0) and (4,0) .

Thus, the solutions of the given equation are x=3,4 .

Factorization method:

x2−7x+12=0

To solve the equation by factorization, split the middle term of the equation.

x2−7x+12=0x2−3x−4x+12=0x(x−3)−4(x−3)=0(x−3)(x−4)=0

Solve the factors for x .

x−3=0x=3

And, x−4=0x=4

Thus, the solutions of the equation are x=3,4 .

The factorization method of solving the equation is preferable.

Hence, the solutions are x=3,4 and the factorization method is preferable.

Chapter 3.5, Problem 54E

Chapter 3.5, Problem 56E

Chapter 3 Solutions

Big Ideas Math A Bridge To Success Algebra 2: Student Edition 2015

Ch. 3.1 - Prob. 1E Ch. 3.1 - Prob. 2E Ch. 3.1 - Prob. 3E Ch. 3.1 - Prob. 4E Ch. 3.1 - Prob. 5E Ch. 3.1 - Prob. 6E Ch. 3.1 - Prob. 7E Ch. 3.1 - Prob. 8E Ch. 3.1 - Prob. 9E Ch. 3.1 - Prob. 10E

Ch. 3.1 - Prob. 11E Ch. 3.1 - Prob. 12E Ch. 3.1 - Prob. 13E Ch. 3.1 - Prob. 14E Ch. 3.1 - Prob. 15E Ch. 3.1 - Prob. 16E Ch. 3.1 - Prob. 17E Ch. 3.1 - Prob. 18E Ch. 3.1 - Prob. 19E Ch. 3.1 - Prob. 20E Ch. 3.1 - Prob. 21E Ch. 3.1 - Prob. 22E Ch. 3.1 - Prob. 23E Ch. 3.1 - Prob. 24E Ch. 3.1 - Prob. 25E Ch. 3.1 - Prob. 26E Ch. 3.1 - Prob. 27E Ch. 3.1 - Prob. 28E Ch. 3.1 - Prob. 29E Ch. 3.1 - Prob. 30E Ch. 3.1 - Prob. 31E Ch. 3.1 - Prob. 32E Ch. 3.1 - Prob. 33E Ch. 3.1 - Prob. 34E Ch. 3.1 - Prob. 35E Ch. 3.1 - Prob. 36E Ch. 3.1 - Prob. 37E Ch. 3.1 - Prob. 38E Ch. 3.1 - Prob. 39E Ch. 3.1 - Prob. 40E Ch. 3.1 - Prob. 41E Ch. 3.1 - Prob. 42E Ch. 3.1 - Prob. 43E Ch. 3.1 - Prob. 44E Ch. 3.1 - Prob. 45E Ch. 3.1 - Prob. 46E Ch. 3.1 - Prob. 47E Ch. 3.1 - Prob. 48E Ch. 3.1 - Prob. 49E Ch. 3.1 - Prob. 50E Ch. 3.1 - Prob. 51E Ch. 3.1 - Prob. 52E Ch. 3.1 - Prob. 53E Ch. 3.1 - Prob. 54E Ch. 3.1 - Prob. 55E Ch. 3.1 - Prob. 56E Ch. 3.1 - Prob. 57E Ch. 3.1 - Prob. 58E Ch. 3.1 - Prob. 59E Ch. 3.1 - Prob. 60E Ch. 3.1 - 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The two different ways to solve the quadratic equation .

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To determine: The two different ways to solve the quadratic equation.

Answer to Problem 55E

Explanation of Solution

Chapter 3 Solutions