<span>2x^3-2xy^2-8x^2+8y^2 =2x</span>²(х-4)-2у²(х-4) =(х-4)(2х²-2у²)=2(х-4)(х²-у²)=
=2(х-4)*х-у)*(х+у)
<span>5a^2-5b^2-15a^3b+15ab^3=5(a</span>²-b²)-15ab(a²-b²)=(a²-b²<span>)(5-15ab)=
=5(a-b)(a+b)(1-3ab)
</span><span>a^2b^2-1-b^2+a^2 =b</span>²(a²-1)+(a²-1)=(a²-1)(b²+1)=(a-1)(a+1)(b²+1)
24x-16x^2-9 12x
__________* _____-2x =
24x 3-4x
-(16x^2-24x+9) 1
__________* _____-2x =
2 -(4x-3)
4x-3
------ - 2x
2
4x-3-4x
______
2
-3
_
2
Ответ: -3/2
3x^2-x-85+11x^2=0
14x^2-x-85=0
D=1-4*14*(-85)=4761
x1,2=1-+69/6
x1=70/6=35/3=11 2/3; x2=-68/6=-34/3=11 1/3
Решениееееееееееееееееееееееееееееееееееее