Question

Using complete sentences, explain how to completely factor 2x2 − 6x − 36

Answer 1

2x^2 - 6x - 36 -- notice all numbers are even, so you can take 2 out like this:
2(x^2 - 3x - 18) -- now factor...
2(x - 6) (x + 3)

Answer 2

Which equation is a quadratic equation?

3x − y = 8x + 2

y = 7x(5 − 2x) + 9

7x2 + y = (3 + x)(7x − 1)

y − 3 = (x2 − 3)(8x + 3)