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Sagot :
Answer:
- 53, - 207, - 7
Step-by-step explanation:
To obtain f(- 2), substitute x = - 2 into f(x), that is
f(- 2) = - 9(- 2)² + 5(- 2) - 7 = - 9(4) - 10 - 7 = - 36 - 10 - 7 = - 53
(b)
Similarly substitute x = 5 into f(x)
f(5) = - 9(5)² + 5(5) - 7 = - 9(25) + 25 - 7 = - 225 + 25 - 7 = - 207
(c)
f(0) = - 9(0)² + 5(0) - 7 = 0 + 0 - 7 = - 7
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