Ignore the one that is crossed out. I already completed that one but then I got stuck on the others. Please show work. Thank you.

Guest Feb 11, 2019

#3**+1 **

\(\left(2a^2b=5b^3+4a^4b^2\right)-\left(7b^3+8a^4b^2-7a^2b\right)\)

simplify

\(\left(2\cdot \:5=a^2b^3b+4a^4b^2\right)-\left(7b^3+8a^4b^2-7a^2b\right)\)

simplify

**\(\left(2a^2b=5b^3+4a^4b^2\right)-7b^3-8a^4b^2+7a^2b\)**

JohnyGotchaApples Feb 11, 2019

#4**+1 **

\((2a^2b-5b^3+4a^4b^2)-(7b^3+8a^4b^2-7a^2b)\\ =(2a^2b-5b^3+4a^4b^2)-7b^3-8a^4b^2+7a^2b\\ =(4a^4b^2-8a^4b^2)+(-5b^3-7b^3)+(2a^2b+7a^2b)\\ =-4a^4b^2-12b^3+9a^2b\)

.MaxWong Feb 14, 2019