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If f(x) = 4x² + +5 then, f(-2)

Sagot :

Answer:

Step-by-step explanation:

equation is given as

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

[tex]f(-2) = 4(-2)^{2} +5[/tex]

solve:

[tex]-2f=4(4)+5\\-2f=16+5\\-2f=21\\\frac{-2f}{-2} =\frac{21}{-2}[/tex]

[tex]f=\frac{21}{-2}[/tex]

[tex]f=-10.5[/tex]