Answer:
-563
Step-by-step explanation:
a = -7 , b = 9 , c = 4
9ab +C
9 × -7 × 9 + 4
81 × -7 + 4
-567 + 4
Yes
f(x) = x³ − 9x² + 11x + 21
f(3) = (3)³ − 9(3)² + 11(3) + 21
f(3) = 27 − 81 + 33 + 21
f(3) = 0
=−6
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