<span>x^2-xy-5x+5y=x(x-y)-5(x-y)=(x-y)(x-5)
2a^2+a-10ab-5b=a(2a+1)-5b(2a+1)=(2a+1)(a-5b)
m-n+2p(m-n)=(m-n)(1+2p)
2)a^2-3ab+3a-9b=a(a-3b)+3(a-3b)=(a-3b)(a+3)
При а=1,b= -1/3
(1-3*(-1/3))(1+3)=(1+1)*4=8</span>
Решение на фотографии.
Ответ: х=-2
(4x²-7x+3)-(x²-8x+11)=(4x²-7x+3)+(-x²+8x-11)=
=4x²-7x+3-x²+8x-11=4x²-x²-7x+8x+3-11=3x²+x-8
(9m²-5m+4)-(-10m+m³+5)=(9m²-5m+4+(10m-m³-5)=
=9m²-5m+4+10m-m³-5=-m³+9m²+5m-1