(6-y)(6+y)/(y-8)(y/(y-6)-2y/(y-6)^2)+12y/(y-6)=
=(6-y)(6+y)/(y+8)*(y^2-8y)/(y-6)^2+(12-y)/(y-6)=
=-y(6+y)/(y-6)+12y/(y-6)=(-6y-y^2+12y)/(y-6)=(6y-y^2)/(y-6)=y(6-y)/(y-6)=-y
4x^2 – 1=(2х-1)(2х+1)
25x^2 – 9y^2=(5х-3у)(5х+3у)
3x^2 – 6x=3х(х-2)
<span> 5by – y =у(5b-1)</span>
bx^2 - bу^2=b(x-y)(x+y)
5х+5у=5(x+y)
bc - bd=b(c-d)
ах^2 + 2аху + ау^2=a(x+y)²
ав^2 - 3в^2 + аву - 3ву=b(b+y)(a-3)
ab-a^2b=ab(1-a)
8m(a-3)+n(a-3)=(a-3)(8m+n)
(p^2-25)-q(p^2-25)=(p²-25)(1-q)=(p-5)(p+5)(1-q)
3а^2-3в^2=3(a-b)(a+b)
12а^2-4=4(3a²-1)
9x^2 + 18ху + 9у^2=9(x+y)²
-7p^2 + 28pq - 28q^2= -7(p²-4pq+4q²)= -7(p-2q)²
<span> 8x^3 - 8y^3= 8(x</span>³-y³)=9(x-y)(x²-xy+b²)
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