Question

Выполни умножение пж

Answer 1

Ответ:

1)(x-9)(x-8)= $x^{2}$-8x-9x+72= $x^{2}$-17x+72

2)(3y+2)(2y-3)= $6y^{2}$-9y+4y-6=$6y^{2}$-5y-6

3)(-5a+b)(2b+a)= -10ab-5$a^{2}$+2$b^{2}$+ab= -9ab-5$a^{2}$+2$b^{2}$

4)(4$x^{2}$+x)(6x+7)= 24$x^{3}$+28$x^{2}$+6$x^{2}$+7x= 24$x^{3}$+34$x^{2}$+7x

5)(9a+1)(2$a^{2}$-2a+5)= 18$a^{3}$-18$a^{2}$+45a+2$a^{2}$-2a+5= 18$a^{3}$-16$a^{2}$+43a+5