Question

Let g(x) = x2 + x. Find g(-10).

A) -100
B) -90
C) 0
D) 90

Answer 1

Answer:90 is the wrong answer just took the test

Explanation:

Answer 2

Put -10 where x is and do the arithmetic.

g(x) = x² + x

g(-10) = (-10)² + (-10) = 100 - 10 = 90 . . . . . . corresponds to selection D

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If you like, you can factor the expression to make evaluation easier.

g(x) = x(x +1)

g(-10) = (-10)(-9) = 90