Question

Раскройте скобки.
( 3а-1)(2а^2-3)
(2x+3)(3-2x)
(4x+1)^2
(2a+1)(4a^2-2a+1)
(7y+4x)+(2x-y)^2

Answer 1

(3a-1)(2a^2-3)=3a*2a^2+3a*(-3)-1*2a^2-1*(-3)=6a^3-9a-2a^2+3
(2x+3)(3-2x)=2x*3+2x*(-2x)+3*3+3*(-2x)=6x-4x^2+9-6x=9-4x^2
(4x+1)^2=16x^2+2*4x*1+1^2=16x^2+8x+1
(2a+1)(4a^2-2a+1)=8a^3-4a^2+2a+4a^2-2a+1=8a^3+1
(7y+4x)+(2x-y)^2=7y+4x+4x^2-4xy+y^2