Question

como resolver essas contas

Answer 1

a) 2*(3x-y-4)-x²+5y*(2/5x²+xy)
6x-2y-8-x²+2x²y+5xy
5xy²+2x²y-x²-2y+6x-8=0

b)(x²+5y)*(3x-y-4)
3x³-x²y-4x²+15xy-5y²-20y
3x³-4x²-x²y-5y²+15xy-20y