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19-08-2019
Mathematics

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4. Simplify the expression:
7x2 - 6+4x + 7 - 5x2 + x
A. 2x2 + 5x +1
B. 2x² + 4x +1
C. 12x² + 5x + 1
D. 12x² + 4x +1

Respuesta :

19-08-2019

Answer:

A. 2x² + 5x + 1

Step-by-step explanation:

[tex]7x^2-6+4x+7-5x^2+x\qquad\text{combine like terms}\\\\=(7x^2-5x^2)+(4x+x)+(-6+7)\\\\=2x^2+5x+1[/tex]

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