math
posted by upset on .
Solve by using the quadratic formula
x^24x45=0

Look up the quadratic formula.
x = [b +/sqrt(b^24ac)]/2a
Then apply it. (a,b,c are the coefficients and constant in the equation)
You should get an integer solution since the equation can easily be foactored to give (x9)(x+5) = 0
the solutions are 9 and 5.
Hint: b^2  4ac = 16 + 180 = 196, which had integer square roots + or  14.