How do you evaluate #(8x - 4x ^ { 2} + 8) + ( 5+ 5x ^ { 2} + 5x ) - ( 8+ 7x - 6x ^ { 2} )#?

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Answer 1 · 2017-12-04T02:27:42

#(8x-4x^2+8)+(5+5x^2+5x)-(8+7x-6x^2)=color(blue)(7x^2+6x+5#

Refer to the explanation for the process.

#(8x-4x^2+8)+(5+5x^2+5x)-(8+7x-6x^2)#

Simplify.

#8x-4x^2+8+5+5x^2+5x-(8+7x-6x^2)#

Simplify parentheses.

#8x-4x^2+8+5+5x^2+5x-8-7x+6x^2)#

Gather like terms.

#(-4x^2+5x^2+6x^2)+(8x+5x-7x)+(8+5-8)#

Simplify.

#7x^2+6x+5#