Question

ײ+5×+6 me ajuda rapidamente ​

Answer 1

ײ -5×+6=0

a = 1; b = - 5; c = 6

∆ = b^2-4ac

∆ = (-5)^2 - 4.1.6

∆ = 25 - 24

∆ = 1

x = [ - b +/- √∆]/2a

x = [ -(-5)+/- √1/2.1

x = [5 +/-1]/2

x' = [5+1]/2 = 6/2 = 3

x" = [5-1]/2 = 4/2 = 2

R.: { 2 ; 3}

Answer 2

Resposta:  x' = - 2    e   x'' = -3

$x^{2} ~+5x+6=0\\ \\ a=1~~,~~b=5~~,~~c=6\\ \\ \\ x=\dfrac{-b\pm\sqrt{b^{2} -4\cdot a\cdot c} }{2\cdot a} ~~~\to ~~~\dfrac{-5\pm\sqrt{5^{2} -4\cdot 1\cdot 6} }{2\cdot 1}~~~\to~~~\dfrac{-5\pm\sqrt{25-24} }{2}~~\to~~ \dfrac{-5\pm\sqrt{1} }{2}$

$x=\dfrac{-5\pm 1}{2} \\ \\ \\ x'=\dfrac{-5+1}{2} ~~~\to~~~ \dfrac{-4}{2} ~~~\to~~~\boxed{x'=-2} \\ \\ \\ \\ x''=\dfrac{-5-1}{2} ~~~\to~~~ \dfrac{-6}{2} ~~~\to~~~\boxed{x''=-3}$

:)