36(x+3)^2-x^2ac^2-bc^2-bc+ac-a+b3x^2+10x-8

36 (х + 3) - х = (6(x + 3)) - x = (6x + 18) - x = (6x + 18 - x)(6x + 18 + x) = (5x + 18)(7x + 18)
ас - bc - bc + ac - a + b = c (a - b) - c (a - b) - (a - b) = (c - c - 1)(a - b)
3x + 10x - 8 = 3 (x - 2/3)(x + 4) = (3x - 2)(x + 4)

3x + 10x - 8 = 0
D = 10 - 4 * 3 * (- 8) = 196
x = (- 10 + 196) : (2 * 3) = 2/3
x = (- 10 - 196) : (2 * 3) = - 4

1) 36(x+3)-x=36(x+6x+9)-x=36x+216x+324-x=35+216x+324
2) ac-bc-bc+ac-a+b=(ac+ac)-(bc+bc)-(a-b)=ac(c+1)-bc(c+1)-(a-b)=
=(c+1) c(a-b)-(a-b)=(c+1)(a-b)(c-1)
3) 3x+10x-8
3x+10x-8=0
D=10-4  3  (-8)=100+96=196
x=(-10+14)/6=2/3
x=(-10-14)/6=-4
3x+10x-8=(x-2/3)(x+4)