Question

What are the x-intercept(s) of the graph of y + 30 = x2 + x?

(−5, 0) and (6, 0)

(−5, 0) and (−6, 0)

(5, 0) and (−6, 0)

(5, 0) and (6, 0)

Answer 1

set y = 0, solve for "x"

Answer 2

First subtract 30 from both sides to get \[\Large y = x^2 + x - 30\]Now you need to factor this. What two numbers multiply to -30, and add up to +1? +6 and -5 work.

Answer 3

thank you! :)