Solve
x2 + 6x -7 = 0 by completing the square.
Solution:-
Solve for x by first isolating the constant and adding the square of half of the coefficient of x to both sides of the equation.
x^2 +6x -7 + 16 – 16 = 0
x^2 +6x + 9 – 16 =0
= 16
x +3 =± 4
x = -3 ± 4
x = -3+4 or -3 – 4
x = 1 ,-7