Find the point of intersection.

Question

(-9/100)(x-10)^2+9=(-1/24)(x-12)^2+6

I don't understand how multiplying
y = (-1/2)(x-12)^2 + 6 by 600 would yield
-25(x-12)^2 + 3600 ? Is it supposed to yield
-300x^2+7200x-43,200+3600?

Answer 1

forget about expanding things. You have

(-1/24)A + 6
multiply by 600 to get
-25A + 3600
A is just (x-12)^2

Answer 2

Thank you.