Question

Resolva a questão

4x²-12x+7=0

Answer 1

$d = { - 12}^{2} - 4 \times 4 \times 7$

$d = 144 - 112$

$d = 22$

$x = \frac{ - ( - 12) \frac{ + }{ - } \sqrt{22} }{2 \times 4}$

$x1 = \frac{12 + 4.7}{8} = 2.0875$

$x2 = \frac{12 - 4.7}{8} = 0.9125$