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Question

6x2 – 7x – 13 = 0

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Solution

Given: 6x2 – 7x – 13 = 0

On splitting the middle term –7x as 6x – 13x, we get:

6x2 + 6x – 13x – 13 = 0

6x(x + 1) – 13(x + 1) = 0

(x + 1) (6x – 13) = 0

We know that if the product of two numbers is zero, then at least one of them must be zero.

Thus,

x + 1 = 0 or 6x – 13 = 0
x = –1 or x = 136
Therefore, the solution of the given equation is x = –1, 136.

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