Question 1 Report
A straight lie y = mx meets the curve y = x2 - 12x + 40 in two distinct points. If one of them is (5, 5) find the other
(7, 5)
Answer Details
When y = 5, y = x2 - 12x + 40, becomes x2 - 12x + 40 = 5 x2 - 12x + 40 - 5 = 0 x2 + 12x + 35 = 0 x2 - 7x - 5x + 35 = 0 x(x - 7) - 5(x - 7) = 0 = (x - 5)(x - 7) x = 5 or 7
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