Use the quadratic formula to solve the quadratic equation x2 - 8x - 4 = 0.

Hello here is a solution:

x² - 8x - 4 = 0.

quadratic equation ax²+bx+c = 0 when : a=1 and b = - 8 and c = - 4

discriminant : d = b²-4ac d = (-8) ²-4 (1) (-4) = 64+16 = 70

x = (-b-rot (d)) / 2a x' = (-b+rot (d)) / 2a ... conrinu