Question 5: Reducing the expression \(7 x^{2}-(3+2 x)(4-x)\) we get

13/01/2022 // by admin// Leave a Comment

Question 5: Reducing the expression \(7 x^{2}-(3+2 x)(4-x)\) we get

A. \(-3x^{2}-5 x-12 \)

B. \(x^{2}-5 x-12 \)

C. \(2 x^{2}-3 x-12 \)

D. \(9 x^{2}-5 x-12 \)

\(7 x^{2}-(3+2 x)(4-x) =7 x^{2}-\left(12-3 x+8 x-2 x^{2}\right)=7 x^{2}-12+3 x-8 x+2 x^{2}=9 x^{2}-5 x-12 \)

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