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Elena L [17]
3 years ago
8

Hi, may someone help me with this question? Thank you!:) “If f(x) = x^2 + 7, find f(x+2)”

Mathematics
2 answers:
finlep [7]3 years ago
5 0

Answer:

=x^2 +4x+11

Step-by-step explanation:

f(x) = x^2 + 7,

Replace x with x+2

f(x+2) = (x+2)^2 + 7

         = (x+2)(x+2) +7

     FOIL

     = x^2 +2x+2x+4 +7

Combine like terms

    =x^2 +4x+11

dolphi86 [110]3 years ago
3 0

Answer:

f(x+2)=x^2+4x+11

Step-by-step explanation:

In f(x)=x^2+7, for all values of x, we substitute x (what is in the parentheses) into x^2+7 to output a y value.

In f(x+2), the term (x+2) is in the parentheses. Therefore, substitute (x+2) for x in x^2+7 to find f(x+2):

f(x+2)=(x+2)^2+7

Expand using (a+b)^2=a^2+2ab+b^2,

f(x+2)=x^2+4x+4+7

Combine like terms:

\boxed{f(x+2)=x^2+4x+11}

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