Ne6mmhearSeg0enicole Ne6mmhearSeg0enicole

24-05-2016
Mathematics

contestada

2.)Which is a solution to the equation?
(x −2)(x + 5) = 18
x = −10

x = −7

x = −4

x = −2

Respuesta :

whiskeyo whiskeyo

24-05-2016

[tex](x-2)(x+5) = 18\\ x^{2}-2x+5x-10=18\\ x^{2}+3x-28=0\\ delta=3^{2}-4*1*(-28)=9+112=121\\ x_{1/2}= \frac{-3+11}{2}/ \frac{-3-11}{2}=4/-7[/tex]

So the answer is -7=x

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someoneunknown10 someoneunknown10

25-06-2020

Answer:

x=-7

Step-by-step explanation: it's B on edg

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