Question

The rectangular room is given by the trinomial x^2+4x-12. What are the possible dimensions of the rectangle? Use factoring. (1 point)
(x-6) and (x-2)
(x+6) and (x+2)
(x-6) and (x+2)
(x+6) and (x-2)
illl give u a meadel!!!!!!!!!!!!!

Answer 1

we're trying to factorise x^2 + 4x - 12.
So first list the factors of 12 and we get
1 and 12
2 and 6
3 and 4
right? But if you look at your equation it says " -12". So we know that one of the numbers have to be a negative but we need to work out which ones to use.
So first which two numbers when added/subtracted will give you 4?

Answer 2

@butterflydreamer so it will be (x+6)(x−2) right?

Answer 3

correct :) Good job!