Question

Solve by completing the square method - 4x²+12x-5

Answer 1

${(2x)}^{2} + 2(2x)(3) + 9 - 9- 5 \\ {(2x + 3)}^{2} - 9 - 5 \\ {(2x +3) }^{2} - 14 \\ 2x + 3 = \sqrt{14} \\ x = \frac{ \sqrt{14 } - 3 }{2}$