Problema Solution
The price y, in dollars per share of a certain computer stock over an 8 year period increased and trend sea erased according to the equation y = -x^2+8x, where x is time in years. The price y2, in dollars per share of a communication stock declined steadily over the same time period according to the equation y = -x + 14. At what values of x are the two stock prices the same?
Answer provided by our tutors
we need to find x such that
-x^2 + 8x = -x + 14
by solving we find the roots
x1 = 7
x2 = 2
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for x = 2 and x = 7 the two stock prices are the same.