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The function y=x^2+x-6 is graphed

 

- what are the values/roots/ solutions when 

x^2+x-6=-4

 

a) x=-4 and 6                          d) x=-3 and 2

b) x=-2 and 1                          e) x=-5 and -6

Guest Apr 25, 2017

Best Answer 

 #1
avatar+4694 
+2

We want to solve this equation for x.

x2 + x - 6 = -4

 

Add 4 to both sides.

x2 + x - 2 = 0

 

Factor.

(x + 2)(x - 1) = 0

 

Set each factor = 0 and solve for x.

x + 2 = 0       and       x - 1 = 0

x = -2            and       x = 1

 

Which is b) smiley

hectictar  Apr 25, 2017
Sort: 

2+0 Answers

 #1
avatar+4694 
+2
Best Answer

We want to solve this equation for x.

x2 + x - 6 = -4

 

Add 4 to both sides.

x2 + x - 2 = 0

 

Factor.

(x + 2)(x - 1) = 0

 

Set each factor = 0 and solve for x.

x + 2 = 0       and       x - 1 = 0

x = -2            and       x = 1

 

Which is b) smiley

hectictar  Apr 25, 2017
 #2
avatar
+1

Thx  @hectictar this assignment is practice for my STARR so I appreciate the help.

(I may keep asking other questions so stay alert brp)

Guest Apr 25, 2017

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