Question

If (a, -20) is a point on the graph of y=x^2-9x, what is a?

Answer 1

solve for x

Answer 2

@nincompoop Yes the first thing you need to do is solve for x

Answer 3

are you just looking for an answer?

Answer 4

Yea, but I got x(x-9), so x=0 and x=9?

Answer 5

then put that as your answer and see if it is correct. though I think it is wrong

Answer 6

y=x(x-9), there's no zero so those above weren't it