Question

Помогите, пожалуйста!!!

Answer 1

$x^2-10x+25=〖(x-5)〗^2 y^2+6y+9=〖(y+3)〗^2 x^3+8y^3=(x+2y)(x^2-2xy+4y^2) x^3-27y^3=(x-3y)(x^2+6xy+〖9y〗^2) 〖(a+1)〗^2-9a^2=a^2+2a+1-9a^2=-8a^2+2a+1=-8(a+1/4)(a-1/2)=4(a+1/4)*(-2)(a-1/2)=(4a+1)(-2a+1)  b^2-〖(b-2)〗^2=b^2-(b^2-4b+4)=4(b-1)$