x2 + 8x - 6 = 0
x2 + 8x + 16 = 22
(x + 4)2 = 22
x + 4 = ± √22
x = -4 ± √22
x2 + 36x = 0 x2 = -36x x = -36
no
x2 plus 3x plus 3 is equals to 0 can be solved by getting the roots.
-2
x2 + 49 = 0 ∴ x2 = -49 ∴ x = 7i
x2 + 7x = 2x2 + 6 x2 - 2x2 + 7x = 6 -x2 +7x - 6 = 0 or alternatively x2 - 7x + 6 = 0
X=i root3
168
No.
(x+1)(x+4) = 0
x2 + 10x = 0 x2 + 10x + 25 = 25 (x + 5)2 = 25 x + 5 = +-5 x1 = 0 x2 =10
x = -3.27 or -6.73