1)1) ab+ac+xb+xc=a(b+c) +x(b+c) =
(a+x)(b+c)
2) 6m-mn-6+n=6(m-1)-n(m-1)=
(6-n)(m-1)
3) a6+a⁴ - 3a²—3=a⁴(a²+1)—3(a²+1)= (a⁴-3)(a²+1)
4) 10ab-2a+5b²—b=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+17,6)*5= 50*5=250
3) 3x³y-2y²—3x²+2y³x=
3x²(xy-1)+2y²(xy-1)=(3x²+2y²)(xy-1)
При х=1 1/2=3/2
y=2/3
X²—7xy+6y²=
=x²-6xy-xy+6y²=
=x(x-y)-6y(x-y)=
=(x-6y)(x-y)