Check whether the following are quadratic equations: x (x + 1) + 8 = – InterviewSolution

InterviewSolution

1.

Check whether the following are quadratic equations: x (x + 1) + 8 = (x + 2) (x − 2)

Answer»

Given; x (x + 1) + 8 = (x + 2) (x − 2)

⇒ x² + x + 8 = x² − 2²

⇒ x² + x + 8 − x² + 4 = 0

⇒ x + 12 = 0

∵ The highest power of x in the equation is 1;

∴ It is not a quadratic equation.

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