a)
5(x-3)-(6-2x)²=0
5(x-3)-(6-2x)(6-2x)=0
5(x-3)-2((3-x)2*(3-x)=0
-5(3-x)-4(3-x)(3-x)=0
(3-x)(-5-4(3-x)=0
(3-x)(-5-12+4x)=0
(3-x)(4x-17)=0
3-x=0 , 4x-17=0
X=3 4x=17
X= 17/4 = 4,25
1) а) (3х+9)-(ху+3у)=3(х+3)-у(х+3)=(3-у)(Х+3)