looking at an example i jotted off the white board today,
C = 550 - 10X + (1/2)X^2
R = 75X - (1/2)X^2
Then Ive written P= R - C which is...
P = 85X - X^2 - 550
but i just jotted the answer, i get how ive got 85x but cant remember how to get the 1/2 x^2 into just -x^2
if someone could go throught the question that would be great,