(-8x+3y)(5y+x)-(-6x+4y)(3y-5x)

Question

(-8x+3y)(5y+x)-(-6x+4y)(3y-5x)

Answer 1

(-8x+3y)(5y+x)-(-6x+4y)(3y-5x)=(-40ху-8х²+15у²+3ху)-(-18ху+30х²+12у²-20ху)=

-37ху-8х²+15у²+38ху-30х²-12у²=ху-38х²+3у²

Answer 2

(-8x+3y)(5y+x)-(-6x+4y)(3y-5x)=

-40xy-8x²+15y²+3xy-(-18xy+30x²+12y²-20xy)=

-40xy-8x²+15y²+3xy+18xy-30x²-12y²+20xy=

-38x²+xy+3y²