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Question
Check whether the following is the quadratic equation:
(x – 3)(2x + 1) = x(x + 5)
Solution
(x - 3)(2x + 1) = x(x + 5)
⇒ 2x2 - 5x - 3 = x2 + 5x
⇒ x2 - 10x - 3 = 0
It is of the form ax2 + bx + c = 0.
Hence, the given equation is quadratic equation.
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