X's square y-3xy's square +2yx's square -y's square X=3x's square y-4xy's square =xy(3x-4y)
-(2x-5)+(3x- 1)=-2x+5+3x- 1 = x+4
(-4y+3)-(-5y-2)=-4y+3-5y+2 =-9y+5
(2a square-1+2a)-3(a- 1+a square) =2a square-1+2a-3a+3-3a square =2-a-a square =2-a( 1+a)
7a party b-(-4a party b+5ab party) -2(2a party b-3ab party) =7a party b+4a party b-5ab party -4a party b+6ab party =7a party b+ab party =ab(7a+b)