Question

Find which of the following equations are quadratic:

x² + 5x – 5 = (x – 3)²

Answer 1

x² + 5x – 5 = (x – 3)²

`\implies` x² + 5x – 5 = x² – 6x + 9

`\implies` 11x – 14 = 0; which is not of the form ax² + bx + c = 0.

∴ Given equation is not a quadratic equation.