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Question

Find the sum and product of the roots of the equation x2 – 2x – 15 = 0

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Solution

x2 – 2x – 15 = 0 ......................... (1)

Comparing (1) with the standard form ax2 +bx + c = 0​

we have a = 1, b = -2 and c = -15

sum of roots = -b/a = - (-2)/1 =2

product of roots = c/a = -15/1 = -15


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