4(x + 1) = 0.
-((4x + 1)(x - 1))
x^2+4x=0 x(x+4)=0 x=0 and x+4=0 x=0 and x=-4
If you can't factor it easily, use the quadratic formula.
x = -½
(3x + 1)(4x - 1)(x - 2)
many solutions
X2 + 4X - 5 = 0 what two factor of - 5 add up to 4? (X - 1)(X + 5) ----------------- ( so, X = 1 and X = - 5 )
x + 4x = 05x = 0x = 0/5x = 0
16x2 + 8x + 1 = 0 : This factorises to (4x + 1)(4x + 1) = 0 When 4x + 1 = 0 then 4x = -1 : x = -1/4.
4x+7=9x+7 -5x=0 x=0
No.
x^2+4x+7