Answer:
38
Step-by-step explanation:
Given that,
x = -4
f(x)=x² - 4x +6
so,
f(-4)= (-4)² - 4 . (-4) +6
=16 +16 +6
= 38

<h2>
Explanation:</h2>
Here we have the following expression:

And the question asks for solving the equation for the variable
. So we need to divide both sides of the equation by
:

<h2>
Learn more:</h2>
Solving equations: brainly.com/question/10643312
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So in a cube, the width, length, and height are the same. Therefore, you have to find the cube root of 15.625 which is 2.5 and so the side length is 2.5