Question

solve 4x2-16x-15=0 by completing square method.

Answer 1

method to solve a quadratic equation is v have add substract coffecient of (b/2)² of equation ax²+bx+c=0
now 4x² -16x -15=0
4x² - 16x +64 -64 -15 =0
(2x-8)² - 79 = 0
(2x-8)² = 79