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f(x)=4x^2+7x+18 find f (-9)

Sagot :

Kimaera1idn

Answer: f(-9)= 243

Step-by-step explanation:

f(x) = 4x²+7x -18

f(-9) = 4(-9)²+7(-9)-18

= 4(81) -63-18

= 324- 81

= 243

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