Question

Quanto é 4x²+ 9 = 12x
$4x ^{2} + 9 = 12 \times$

Answer 1

$4 {x}^{2} + 9 = 12x \\ 4 {x}^{2} - 12x + 9 = 0 \\ \\ delta = {b}^{2} - 4ac \\ delta = {12}^{2} - 4(4)(9) \\ delta = 144 - 144 \\ delta = 0 \\ \\ \frac{ - b + \sqrt{delta} }{2a} \\ \frac{ - ( - 12) + \sqrt{0} }{8} \\ \frac{12}{8} = \frac{3}{2}$


Resposta final: x = 3/2