Question

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

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

Answer 1

-2 and 5

Explanation:

trust

Answer 2

x = 5 x = -2

Explanation:

y = x^2 – 3x – 10

Set the equation equal to zero

0= x^2 – 3x – 10

Factor

What 2 numbers multiply to -10 and add to -3

-5 *2 = -10

-5+2 = -3

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

Using the zero product property

x-5 = 0 x+2 = 0

x = 5 x = -2