Question 614214
2x(x + 5) = 600


2x^2 + 10x = 600 ___ x^2 + 5x = 300 ___ x^2 + 5x - 300 = 0


factoring ___ (x + 20)(x - 15) = 0


x + 20 = 0 ___ x = -20 ___ negative value not realistic


x - 15 = 0 ___ x = 15