Question

Calculate f(4x + 5) if f(x)=x^2

Answer 1

13x

Explanation:

(x)(4(2)+5)

x(8+5)

x(13)

13x . answer

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Answer 2

`\huge\boxed{\sf f(4x + 5) = 16x\² + 40x + 25}`

Explanation:

Given that:

f(x) = x²

Put x = 4x + 5

f(4x + 5) = (4x + 5)²

f(4x + 5) = (4x + 5)(4x + 5)

f(4x + 5) = 4x(4x + 5) + 5(4x + 5)

f(4x + 5) = 16x² + 20x + 20x + 25

f(4x + 5) = 16x² + 40x + 25

`\rule[225]{225}{2}`

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~AH1807

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