4x2 - 5x + 9x2 - 12x simplifying expressions A.– 4x B. 5x^2-7xC.12x^2-17xD.5x^2+17x

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4x2 - 5x + 9x2 - 12x simplifying expressions

A.– 4x

B. 5x^2-7x

C.12x^2-17x

D.5x^2+17x

step 1

Combine like terms

(4x^2+9x^2)+(-5x-12x)

13x^2-17x

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