1) (3x-2)(5-6x^2) 2) (x+1)(x-3) 3) (x-3y)(x-3y) 4)(x-y)(x^2+xy+y^2) - вопрос №9919478132562213333422 от savoian82ozq31t 07.12.2020 15:45

Question

Алгебра: 1) (3x-2)(5-6x^2) 2) (x+1)(x-3) 3) (x-3y)(x-3y) 4)(x-y)(x^2+xy+y^2) ))

savoian82ozq31t · Answer

1) (3x-2)(5-6x^2)=15x-18x³-10+12x²2) (x+1)(x-3)=x²-3x+x-3=x²-2x-33) (x-3y)(x-3y)=x²-3xy-3xy+9y²=x²-6xy+9y²4)(x-y)(x^2+xy+y^2)=x³+x²y+xy²-x²y-xy²-y³=x³-y³...