cmo solucionar este problema x elebado 2+5x+6=0.... Question from @anita11

August 2018 2 11 Report

cmo solucionar este problema x elebado 2+5x+6=0

fàcil :
2
x + 5x + 6 = 0 , si usamos la forma normal no te sale tenes k usar la formula general :
-b +- V (b)2 - 4 (a)(c)
2(a)

-(5) +- V (5)2 - 4 (1)(6)
2 (1)

-5 +- V 25- 24 =   -5 +-V1 = -5 +- 1
2 2 2

x1= (-5 + 1)/ 2= -2 x2= (-5-1)/2= -3 Salñudos !

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franelca

$x^{2}+5x+6=0\\ utiliza\ la\ siguiente\ fórmula\\ \\ x=\frac{-b+-\sqrt{b^{2}-4ac}}{2a}\\ \\ x=\frac{-5+-\sqrt{5^{2}-4\cdot1\cdot6}}{2\cdot1}=\frac{-5+-\sqrt{25-24}}{2}=\frac{-5+-\sqrt{1}}{2}=\frac{-5+-1}{2}=\\ \\ de\ aqui\ salen\ las\ dos\ soluciones\\ \\ x_{1}=\frac{-5+1}{2}=\frac{-4}{2}=-2\\ \\ x_{2}=\frac{-5-1}{2}=\frac{-6}{2}=-3$

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