If the sum of the roots of 2x\(^2\) + 5mx + n = 0 is 5, find the value of m.

Assessment: WAEC SSCE - Further Mathematics - 2020 (Objective) Subject: Further Mathematics

Question 1 Report

If the sum of the roots of 2x\(^2\) + 5mx + n = 0 is 5, find the value of m.

Answer Details
Let's first recall the formula for the sum of the roots of a quadratic equation in the form ax\(^2\) + bx + c = 0: Sum of roots = -b/a In the given equation, 2x\(^2\) + 5mx + n = 0, the coefficient of x\(^2\) is 2, which means a = 2. Therefore, the sum of the roots can be expressed as: Sum of roots = - (5m) / 2 We are given that the sum of the roots is 5, so we can set up an equation: 5 = - (5m) / 2 Multiplying both sides by -2, we get: -10 = 5m Dividing both sides by 5, we obtain: m = -2 Therefore, the value of m is -2. So the answer is -2.0.

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