How do you find the sum or difference of $(2x^2-7)+(8-5x^2)$ ?

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Answer 1 · 2018-03-29T08:34:07

$1-3x^2$

$(2x^2-7)+(8-5x^2)$

First remove the parenthesis, they are serving no purpose here:

$2x^2-7+8-5x^2$

Add like terms:

$1-3x^2$

How do you find the sum or difference of (2x^2-7)+(8-5x^2)(2x^2-7)+(8-5x^2)?