1.

Check whether the following are Quadratic equations(x − 3)(2x + 1) = x(x + 5)

Answer»

(x - 3)(2x + 1) = x(x + 5)

⇒ 2x- 5x - 3 = x+ 5x

⇒  x- 10x - 3 = 0

It is of the form ax2 + bx + c = 0.

Hence, the given equation is quadratic equation.



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