23btyler 23btyler

13-12-2019
Mathematics

contestada

If f(x)=x^2-15 and f(a)=49, what is the value of a? Explain.

Respuesta :

Yang100 Yang100

13-12-2019

Answer:

a=8, -8

Step-by-step explanation:

a^2-15=49

a^2=49+15

a^2=64

a=sqrt(64)

a=8, -8

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