Question

2x²-14x+20=0 de 2⁰ grau por favor​

Answer 1

Resposta:

Explicação passo-a-passo:

$2x^{2} -14x+20=0$ ⇔ $x^{2} -7x+10=0$

Δ $=(-7)^{2} - 4.(1).10 = 49 - 40 = 9$

$x = \frac{-(-14) +- (\sqrt{9} )}{2.1} \\\\x= \frac{14+-3}{2} \\\\Logo, \\\\\\x' = \frac{17}{2} \\\\x'' = \frac{11}{2}$