Question

4x(elevado a)2+9=12x urgenteeee equação 2 grau

Answer 1

4x² + 9 = 12x
4x² - 12x + 9 = 0

Δ= (-12)² - 4 . 4 . 9
Δ= 144 - 144
Δ= 0

x= 12 ± 0 / 8
x'= 12 / 8 (÷4) = 3/2
x"= 12 / 8 (÷4) = 3/2

Answer 2

$4x^{2} + 9 = 12x \\ 4x^{2} - 12x + 9 = 0 \\ d = ( - 12)^{2} - 4.4.9 \\ d = 144 - 144 \\ d = 0 \\ \\ x = 12 + - \frac{0}{8} \\ x1 = \frac{12}{8} \div (4 )\\ = \frac{3}{2} \\ \\ x2 = \frac{12}{8} \div (4) = \frac{3}{2}$