Question

Subtract -5a+2b - 3ab from the sum of 3a + 2b, -a - 4b+2ab and

6ab+ 2a-3b.​

Answer 1

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Answer 2

$\sf{\left(3a+2b\right)+\left(-a-4b+2ab\right)+\left(6ab+2a-3b\right)-\left(-5a+2b-3ab\right)}$

$\sf{=3a+2b-a-4b+2ab+6ab+2a-3b-\left(-5a+2b-3ab\right)}$

$\sf{=3a+2b-a-4b+2ab+6ab+2a-3b+5a-2b+3ab}$

$\sf{=2ab+6ab+3ab+3a-a+2a+5a+2b-4b-3b-2b}$

$\sf{=2ab+6ab+3ab+9a+2b-4b-3b-2b}$

$\sf{=11ab+9a+2b-4b-3b-2b}$

$\sf{=11ab+9a-7b}$

Note : We need to get rid of expression parentheses.  If there is a negative sign in front of it, each term within the expression changes sign. Otherwise, the expression remains unchanged.