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CTET 2 Math and Science 11 Jan 2023 Paper

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Question : 53

Total: 150

A student solved the given quadratic equation in the following way :
x² + 6x = 27
x² + 6x + 9 = 27 + 9
(x + 3)² = 36
x + 3 = 6
x = 6 - 3
x = 3
Which of the following represents the error committed by the student ?

Adding 9 on both the sides
Using the wrong algebraic identity
Not including the negative root in the solution
There is no mistake as both the roots are equal

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