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In Exercises 65—72, perform the indicated operation or operations. Simplify the result, if possible.
68.
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Introductory Algebra for College Students (7th Edition)
- Make Sense? In Exercises 135–138, determine whether each statement makes sense or does not make sense, and explain your reasoning. 135. Knowing the difference between factors and terms is important: In (3x?y)“, I can distribute the exponent 2 on each factor, but in (3x² + y)', I cannot do the same thing on each term. 136. I used the FOIL method to find the product of x + 5 and x + 2x + 1. 137. Instead of using the formula for the square of a binomial sum, I prefer to write the binomial sum twice and then apply the FOIL method. 138. Special-product formulas have patterns that make their multiplications quicker than using the FOIL method.arrow_forwardIn Exercises 112–114, multiply or divide as indicated. x* + 6x + 9 x + 3 112. 3x + x 6x + 2 113. x2 - 4 x - 2 x2 - 1 X - 1 x? - 5x - 24 x2 - 10x + 16 114. x? - x - 12 x? + x - 6arrow_forwardRationalize the numerator of x+10 – 100 Paragraph A.arrow_forward
- Make Sense? In Exercises 135–138, determine whether each statement makes sense or does not make sense, and explain your reasoning. 135. I use the same ideas to multiply (V2 + 5) (V2 + 4) that I did to find the binomial product (x + 5)(x + 4). 136. I used a special-product formula and simplified as follows: (V2 + V5)? = 2 + 5 = 7. 137. In some cases when I multiply a square root expression and its conjugate, the simplified product contains a radical. 138. I use the fact that 1 is the multiplicative identity to both rationalize denominators and rewrite rational expressions with a common denominator.arrow_forwardOptions: A. -4z^2 B. -3z^2-5z C. -3z^2-5z+1 D. -3z^2-5z-1 Can you pleaseee do this fastt and can you show work on A PAPER PLEASEEarrow_forwardWhich property justifies (a+b)+0=(a+b)arrow_forward
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage