Question

A) X²+4X-12=0 b) 2X²+8X+1=0......selesaikan dengan kuadrat sempurna

Answer 1

A)
 x² + 4x - 12 = 0
x² + 4x - 12 + 4 = 4
x² + 4x + 4 = 4 + 12
(X + 2)² = 16
x +2 = + √16 

x  = + 4 - 2

x1 = 4 - 2= 2
x2 = -4 - 2= -6