A^2+ab+ax+bx=a(a+b)+x(a+b)=(a+b)(a+x)
6m-12-2n+mn=6(m-2)+n(m-2)=(m-2)(6+n)
<span>x/(x+2) - (x-2)²/2 * (1/(x²-4) +1/(x²-4x+4)) =</span>
= x/(x+2) - (x-2)²/2 * (1/(x-2)(x+2) +1/(x-2)<span>²) =</span>
= x/(x+2) - (x-2)²/2 * ((x-2)/(x-2)²(x+2) + (x+2)/(x-2)²(x+2)) =
= x/(x+2) - (x-2)²/2 * (x-2 + x+2)/(x-2)²(x+2) =
= x/(x+2) - (x-2)²/2 * 2x/(x-2)²(x+2) =
= x/(x+2) - ((x-2)² *2x ) / 2(x-2)²(x+2) =
= x/(x+2) - x/(x+2) = 0
Ответ:
х = 50
Объяснение:
(5 - 2 х) (4 х 2 + 10 х + 25) = 2,5 х - 8 х 3,
53 - (2 х) 3 = 2,5 х - 8 х 3,
125 - 8 х3 = 2,5 х - 8 х 3,
-2,5 х = - 125,
х = 50
1)три пятых = 0,6
2)девять восьмых= 1.125
3)три двадцатых= 0.15