$$(7x-3y)(x-4y)+(5x-9y)(y-2x)$$
$-\left(3x-y\right)\left(x+3y\right)$
$$7x^{2}-28xy-3yx+12y^{2}+\left(5x-9y\right)\left(y-2x\right)$$
$$7x^{2}-31xy+12y^{2}+\left(5x-9y\right)\left(y-2x\right)$$
$$7x^{2}-31xy+12y^{2}+5xy-10x^{2}-9y^{2}+18yx$$
$$7x^{2}-31xy+12y^{2}+23xy-10x^{2}-9y^{2}$$
$$7x^{2}-8xy+12y^{2}-10x^{2}-9y^{2}$$
$$-3x^{2}-8xy+12y^{2}-9y^{2}$$
$$-3x^{2}-8xy+3y^{2}$$
Show Solution
Hide Solution
$3y^{2}-8xy-3x^{2}$
