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Lera25 [3.4K]
2 years ago
9

If f(x) = 4x² + +5 then, f(-2)

Mathematics
1 answer:
galben [10]2 years ago
5 0

Answer:

Step-by-step explanation:

equation is given as

fx=4x^{2} +5 if fx<em> is </em>f(-2) then we knew the vale of x which is -2\\ so we will substitute it in the equation as:

f(-2) = 4(-2)^{2} +5

solve:

-2f=4(4)+5\\-2f=16+5\\-2f=21\\\frac{-2f}{-2} =\frac{21}{-2}

f=\frac{21}{-2}

f=-10.5

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