Question

What are the roots of y = x2 – 3x - 10?

0 -3 and -10
0-2 and 5
2 and -5
3 and 10

Answer 1

roots: -2 and 5

Explanation:

What are the roots of y = x2 – 3x - 10?

we see...

factor -10 .... using the X-method.

-10 = 2 * -5

where 2 + -5 = -3

so

y = (x +2)(x - 5)

roots are -2 and 5