EddyO401269 EddyO401269

28-10-2022
Mathematics

contestada

Let f (x) = x^2 + 8x.a) Evaluate f(-3).b) Solve f(x) -16.

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AbhiQ41688 AbhiQ41688

28-10-2022

Solution

We have the following function:

[tex]f(x)=x^2+8x[/tex]

Part a

[tex]f(-3)=9-72=-68[/tex]

Part b

We can do this:

[tex]x^{2}+8x+16=0[/tex]

If we factorize we got:

(x+4)²

Then the answer is:

x=-4

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