1. 1) a(b + c) + x(b + c) = (a + x)(b + c)
2) 6(m - 1) - n(m - 1) = (6 - n)(m - 1)
3) a^4(a^2 + 1) - 3(a^2 + 1)= (a^4 - 3)(a^2 + a)
4) 2a(5b-1)+b(5b-1)=(2a+b)(5b-1)
2. 32,4*6,7+17,6*8,3-32,4*1,7-3,3*17,6 = 32,4*(6,7-1,7) + 17,6*(8,3-3,3)=32,4*5 + 17,6*5 = 5*(32,4+17,6) = 5*50=250
ответ:250
4. x^2 - 7xy + 6y^2 =( x^2 - xy) - (6xy - 6y^2) = x(x - y) - 6y(x - y) = ( x - y)(x - 6y)
3 не смогла