- x^2 = - 9
x^2 = 9
x = ± 3
x1 = - 3
y1 = - 9
x2 = 3
y2 = - 9
( - 3; - 9) ; ( 3; - 9)
6х(1-у)-8х(1-у)=(6х-8у)*(1-у)
(6*(-4)-8*2)*(1-2)=(-24-8)*(-1)=32
Ответ:32
Ответ:
Объяснение:
4(x+9y-7)=4x+36y-28
-6(-a-8b+7c)=6a+48b-42c
-0.7n(7a-2.1+5k)=-4.9na+1.47n-3.5nk
D=576-4*1*108=576-432=144
х1=(24+12)\2=18
х2=(24-12)\2=6
2) D=121-4*24*1=121-96=25
х1=(11-5)\2=3
х2=(11+5)\2=8
3)D=81-4*1*14=81-56=25
х1=-(9+5)\2=-2
х2=(-9-5)\2=-7