Разложите на множители А)3х-3у= Б)а²-9b= В)а²-4а+4= Г)а(b-c)+3(c-b)= Д)3а+3-na-n= Решите уравнение 8х(1+2х)-(4х+3)(4х-3)=2х Сократите: х²-у² ____ 3х-3х²+3у-2ху Решите Х²=-3х+4

a) 3x -3y =3(x -y) b) a² -9b² =(a -3b)(a +3b) в) a² -4a +4 =(a -2)² =(a -2)(a -2) г) a(b-c) +3(c-b) =a(b -c) -3(b -c) =(b -c)(a -3) д) 3a+3 -na -n =3(a+1) -n(a +1) =(a +1)(3 -n) 8x(1+2x) -(4x+3)(4x -3) =2x 8x +16x² -(16x² -9) -2x =0 6x +16x² -16x² +9 =0 6x = -9 x = -9/6 x = -3/2 x = -1.5 x² = -3x +4 x² +3x =4 x² +3x -4 =0 D=9 +16 =25 =5² x1 =(-3 -5)/2 = -4 x2 =(-3 +5)/2 =1