Respuesta:
Explicación paso a paso:
a) (x+2)(x-3)=6
[tex]x^{2} -x-6=6[/tex]
[tex]x^{2} -x-12=0\\[/tex]
[tex]a=1, b=-1, c= -12[/tex]
calculamos la discriminante
[tex]d = {b^{2} - 4ac}[/tex]
[tex]d = (-1)^{2} - (4)(1)(-12)} = 1 + 48 = 49[/tex]
[tex]x1= \frac{-(-1) + \sqrt{49} }{2(1)} =\frac{1+7}{2} = 4[/tex]
[tex]x2= \frac{-(-1) - \sqrt{49} }{2(1)} = \frac{1-7}{2} = -3\\[/tex]
b) (x+1)(x-5)=16
[tex]x^{2} -4x-5=16[/tex]
[tex]x^{2} -4x-21= 0[/tex]
[tex]a=1, b=-4, c= -21[/tex]
[tex]d = {(-4)^{2} - 4(1)(-21)} = 16 + 84 = 100[/tex]
[tex]\\x1= \frac{-(-4) + \sqrt{100} }{2(1)} =\frac{4+10}{2} = 7[/tex]
[tex]\\x2= \frac{-(-4) - \sqrt{100} }{2(1)} =\frac{4-10}{2} = -3[/tex]
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Respuesta:
Explicación paso a paso:
a) (x+2)(x-3)=6
[tex]x^{2} -x-6=6[/tex]
[tex]x^{2} -x-12=0\\[/tex]
[tex]a=1, b=-1, c= -12[/tex]
calculamos la discriminante
[tex]d = {b^{2} - 4ac}[/tex]
[tex]d = (-1)^{2} - (4)(1)(-12)} = 1 + 48 = 49[/tex]
[tex]x1= \frac{-(-1) + \sqrt{49} }{2(1)} =\frac{1+7}{2} = 4[/tex]
[tex]x2= \frac{-(-1) - \sqrt{49} }{2(1)} = \frac{1-7}{2} = -3\\[/tex]
b) (x+1)(x-5)=16
[tex]x^{2} -4x-5=16[/tex]
[tex]x^{2} -4x-21= 0[/tex]
[tex]a=1, b=-4, c= -21[/tex]
[tex]d = {(-4)^{2} - 4(1)(-21)} = 16 + 84 = 100[/tex]
[tex]\\x1= \frac{-(-4) + \sqrt{100} }{2(1)} =\frac{4+10}{2} = 7[/tex]
[tex]\\x2= \frac{-(-4) - \sqrt{100} }{2(1)} =\frac{4-10}{2} = -3[/tex]