7ху+у²=у(7х+у)!!!!!!!!!!!!!!!!
(25/36a^6-a^3b^3+36/25b^6)(5/6a^3+6/5b^3)=125a^9/216+216b^9/125
<span>1
a)y*(-2f)*(-3b) = 6*b*f*y
b) 2xy*7xz =14*x^2*y*z
в) 5ab*(-0,2b)</span>=a*b^2
2)
<span>a) 3x-x+7x-3x = 6x
b)2b-a+4b-7a+7</span>=6b-6a+7
3)
x+(x+3)+(x-4)=3*x-1
(1+(1+x))*2=4+2x
4)
<span>а) 4а+(а+б)-(2а+3б) = 3a-2б
б) 2(х+3у)-3(3х-у)</span>=-7х+9у