HistoryGuru HistoryGuru

03-10-2018
Mathematics

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Let f(x) = 2x^2 +3x-4 find f(3h)

A ) 18h^2 + 9h - 4

B ) 18h^2 + 3h - 4

C ) 2h^2+9h + 14

D) 9h^2 + 9h - 4

Please do help with this one

Respuesta :

jimrgrant1 jimrgrant1

03-10-2018

A

substitute x = 3h into f(x)

f(3h) = 2(3h)² + 3(3h) - 4 = (2 × 9h²) + 9h - 4 = 18h² + 9h - 4

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anamariaguarderas anamariaguarderas

03-10-2018

Replace x by 3h.

The answer is A

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