Anonymous
Feb 24
Evaluate the following when x=-3,y=4 and z=-2 a. 2y+x-5z b. 2x2-4y c. X3 -z2y d. X+y/y+z?
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Feb 24
a. 2y + x - 5z
= 2(4) + (-3) - 5(-2)
= 8 - 3 + 10
= 15
b. 2x^2 - 4y
= 2(-3)^2 - 4(4)
= 2(9) - 16
= 18 - 16
= 2
c. x^3 - z^2y
= (-3)^3 - (-2)^2(4)
= -27 - 4(4)
= -27 - 16
= -43
d. x + y / y + z
= (-3 + 4) / (4 - 2)
= 1 / 2
= 0.5
= 2(4) + (-3) - 5(-2)
= 8 - 3 + 10
= 15
b. 2x^2 - 4y
= 2(-3)^2 - 4(4)
= 2(9) - 16
= 18 - 16
= 2
c. x^3 - z^2y
= (-3)^3 - (-2)^2(4)
= -27 - 4(4)
= -27 - 16
= -43
d. x + y / y + z
= (-3 + 4) / (4 - 2)
= 1 / 2
= 0.5
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