exam Maths Puzzle Numerical Ability

The demand equation for a certain type of printer is given by
D= -200p +35,000
The supply equation is predicted to be
S= -p2 +400p - 20,000
Find the equilibrium price.

Read Solution (Total 0)

exam Other Question

Can someone help me on this problem #52, page 562 in the textbook I showe above.
Just in case you don't have the book, here is the problem:

I need to find the constant of va 3x^2 + 8x + 5 how would i factor this ?