X^2+x-6 has a solution which is a)<7 b)5<x<7 c)-5<x<-2 d)-1<x<0 or e)3<x<4.5?

Question

X^2+x-6 has a solution which is a)<7 b)5<x<7 c)-5<x<-2 d)-1<x<0 or e)3<x<4.5?

Answer 1

You can factor to find the answer.  

x^2+x-6=0

(x-2)(x+3)=0

x-2=0             x+3=0

x=2                x=-3

So the two answers are 2 and -3.  

So I guess your answer would be A because the two answers are less than seven.  I hope this helps!!

Answer 2

its (x+3)(x-2)

so x= -3 , 2

Answer 3

second grade equation

x = -1 (+)(-) square root ( 1 + 24) / 2

x = -1 (+)(-) 5  / 2

one solution x = -1 + 5 / 2 = 2

another one x= -1 - 5 / 2 = -3

answer a) &lt; 7; c) -5 &lt; x &lt; -2