sarahelisabeth444 sarahelisabeth444

03-01-2019
Mathematics

contestada

Find the following showing the steps
(x) = 7 - 5x + 7x^2, find f(-9a)

Respuesta :

jimrgrant1 jimrgrant1

03-01-2019

Answer:

7 + 45a + 567a²

Step-by-step explanation:

to evaluate f(- 9a) substitute x = - 9a into f(x)

f(- 9a) = 7 - 5(- 9a) + 7(- 9a)²

= 7 + 45a + 7(81a²) = 7 + 45a + 567a²

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