Answer:
1) 142. 2) -42
Explanation:
1) replace all x in the equation with 9.
x^2 + 7x - 2
= 9^2 + 7(9) -2
= 81 + 63 -2
= 142
2) - (-3)^2 + 5(-3) -18
= - (-3 X -3) - 15 -18
= - (+9) - 15 - 18
= -9 -15 -18
= -42
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