Chapter 1.4, Problem 100PS

To determine

(35)

To check:

The value of the expression $3x+7y$ for the given values $x=-1$ and $y=-2$ using the calculator.

To determine

(36)

To check:

The value of the expression $5x-9y$ for the given values $x=-2$ and $y=5$ using the calculator.

To determine

(37)

To check:

The value of the expression $4x^2-y^2$ for the given values $x=2$ and $y=-2$ using the calculator.

To determine

(38)

To check:

The value of the expression $3a^2+2b^2$ for the given values $a=2$ and $b=5$ using the calculator.

To determine

(39)

To check:

The value of the expression $2a^2-ab+b^2$ for the given values $a=-1$ and $b=-2$ using the calculator.

To determine

(40)

To check:

The value of the expression $-x^2+2xy+3y^2$ for the given values $x=-3$ and $y=3$ using the calculator.

To determine

(41)

To check:

The value of the expression $2x^2-4xy-3y^2$ for the given values $x=1$ and $y=-1$ using the calculator.

To determine

(42)

To check:

The value of the expression $4x^2+xy-y^2$ for the given values $x=3$ and $y=-2$ using the calculator.

To determine

(43)

To check:

The value of the expression $3xy-x^2{y}^2+2y^2$ for the given values $x=5$ and $y=-1$ using the calculator.

To determine

(44)

To check:

The value of the expression $x^2{y}^3-2xy+x^2{y}^2$ for the given values $x=-1$ and $y=-3$ using the calculator.

To determine

(45)

To check:

The value of the expression $7a-2b-9a+3b$ the values $a=4$ and $b=-6$ using the calculator.

To determine

(46)

To check:

The value of the expression $-4x+9y-3x-y$ for $x=-4$ and $y=7$ using the calculator.

To determine

(47)

To check:

The value of the expression ${(x-y)}^2$ for $x=5$ and $y=-3$ using the calculator.

To determine

(48)

To check:

The value of the expression $2{(a+b)}^2$ for $a=6$, $b=-1$ using the calculator.

To determine

(49)

To check:

The value of the expression $-2a-3a+7b-b,$ for $a=-10$ and $b=9$ using the calculator.

To determine

(50)

To check:

The value of the expression $3(x-2)-4(x+3)$ for $x=-2$ using the calculator.

To determine

(51)

To check:

The value of the expression $-2(x+4)-(2x-1)$ for $x=-3$ using the calculator.

To determine

(52)

To check:

The value of the expression $-4(2x-1)+7(3x+4)$ for $x=4$ using the calculator.

To determine

(53)

To check:

The value of the expression $2(x-1)-(x+2)-3(2x-1)$ for $x=-1$ using the calculator.

To determine

(54)

To check:

The value of the expression $-3(x+1)+4(-x-2)-3(-x+4)$ for $x=-\frac{1}{2}$ using the calculator.

To determine

(55)

To check:

The value of the expression $3(x^2-1)-4(x^2+1)-(2x^2-1)$ for $x=\frac{2}{3}$ using the calculator.

To determine

(56)

To check:

The value of the expression $2(n^2+1)-3(n^2-3)+3(5n^2-2)$ for $n=\frac{1}{4}$ using the calculator.

To determine

(57)

To check:

The value of the expression $5(x-2y)-3(2x+y)-2(x-y)$ for $x=\frac{1}{3}$ and $y=-\frac{3}{4}$ using the calculator.