Question

2X2+14X+20=0
Desarrollo

Answer 1

2X² + 14X + 20 = 0(Podemos simplificar entre 2)

X² + 7X + 10 = 0

Donde: a = 1; b = 7; c = 10

$X=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$


$X=\frac{-7\pm \sqrt{7^2-4(1)(10)}}{2(1)}$

$X=\frac{-7\pm \sqrt{49-40}}{2}$

$X=\frac{-7\pm \sqrt{9}}{2}$

$X=\frac{-7\pm \ 3}{2}$

X1 = [-7 + 3]/2 = -4/2 = -2

X2 = [-7 - 3]/2 = -10/2 = -5

X1 = -2; X2 = -5