Question

(8u^2+3u-4)+(8u^2+3u-1)-(3u^2-3u-8)

Answer 1

Simplify the expression

$\mleft(8u^2+3u-4\mright)+\mleft(8u^2+3u-1\mright)-\mleft(3u^2-3u-8\mright)​$

Removing all the parentheses, taking special care to change the signs of the last three terms:

$8u^2+3u-4+8u^2+3u-1-3u^2+3u+8​$

Now collect like terms:

$8u^2+8u^2-3u^2+3u+3u+3u-4-1+8​$$13u^2+9u+3​$