Question

What are the x-intercept(s) of the graph of y + 20 = x2 − x?

(−4, 0) and (−5, 0)

(−4, 0) and (5, 0)

(4, 0) and (−5, 0)

(4, 0) and (5, 0)

Answer 1

Put y=0. The value then obtained from the equation will give you x intercepts.

Answer 2

huh? you just lost meh

Answer 3

put y=0 in given equation!

Answer 4

-_-

Answer 5

And what does that mean?

Answer 6

oh nothing

Answer 7

\[ \large y=f(x)=x^2-x-20 \]
Does this look more like a form you're comfortable with?, then do what @ujjwal suggested.

Answer 8

a little better

Answer 9

If you now apply what @ujjwal told you, because x intersects means that y has to be zero, these are the roots of the equation, the points where it crosses the x-axis, therefore y=0, you will get:

\[ \Large x^2-x-20=0\]
And this might even look a little bit better then the last one.