<span>(7х+3у=43
(4х-3у=67
1)11х=110
х=10
2) 70+3у=43
3у=-27
у=-9
Ответ: (10;-9)</span>
(х*2+3х+2)(х+1)=х*3+3х*2+2х+х*2+3х+2=х*3+4х*2+5х+2
х³+4х²+5х+2 I x²+3x+2
x+1
x³+3x²+2x
x²+3x+2
x²+3x+2
0
........................................
B)2/(29*30) = 1/435
Сочетание [m!*(n-m)!]/n!
<span>5c²n</span>⁵<span>*3c²n</span>⁶=5·3·c²⁺²·n⁵⁺⁶=15c⁴n¹¹