Find the x-intercepts for the parabola defined by the equation below.

y = x^2 + x - 12

A. (-12, 0) and (1, 0)
B. (-4, 0) and (3, 0)
C. (0, -4) and (0, 3)
D. (0, -12) and (0, 1)

Question

Find the x-intercepts for the parabola defined by the equation below.

y = x^2 + x - 12

A. (-12, 0) and (1, 0)
B. (-4, 0) and (3, 0)
C. (0, -4) and (0, 3)
D. (0, -12) and (0, 1)

anonymous · Answer

get the equation into factored form like: 

you need to think about what two numbers can you multiply together and get -12 and then add together to get +1

anonymous · Answer

(x-3)(x+4)
set each expression equal to 0 and solve.
(x-3) =0
(x+4) =0

anonymous · Answer

remember that an x intercept is where the line crosses the x axis which means it will be wherever the y value is 0

anonymous · Answer

@ehuman why not let him think about the problem instead of blurting out the answer?

anonymous · Answer

the answer is not blurted nor is it written, the first step was given
they still have to work towards the solution