Question

Somebody help me out

Answer 1

F(x)= 4(-5)^2 + (-5) -5
=4(25) -5-5
=100-5-5
=90

Answer 2

`\longrightarrow{\green{90}}`

Explanation:

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

Now,

`f( - 5) = 4( { - 5})^(2) + ( - 5) - 5 \\ \\ = 4 * 25 - 5 - 5 \\ \\ = 100 - 5 - 5 \\ \\ = 100 - 10 \\ \\ = 90`

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Note:-

`\sf\purple{BODMAS\: rule.}`

B = Brackets

O = Orders

D = Division

M = Multiplication

A = Addition

S = Subtraction

And,

`\sf\red{(-\:x\:-)\:=\:+}`

`\sf\pink{(+\:x\:-)\:=\:-}`

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`\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{♡}}}}}`