4x^2 - 12x
+ 9 = 4x^2 + 40x + 25
-12x + 9 =
40x + 25
<span> - 52x = 16</span>
<span>X = - 16/52
= - 4/13</span>
305+x+55=1000
360+x=1000
x=1000-360
x=640
Ответ:
Пошаговое объяснение:
1) 17/28*(-4/51)=-1/21
2)
2) =-3a+5b
3)=-5y+20+2y+10=30-3y
4)=-9.2x+12-5+2.6x+1.8x-6=-4.8x+1
-4.8*5/12+1=-24/5*5/12+1=-2+1=-1