Mathematics · Pedagogy of Mathematics
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?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1There is no mistake as both the roots are equal
- 2Not including the negative root in the solution✓
- 3Using the wrong algebraic identity
- 4Adding 9 on both the sides
Correct answer
Not including the negative root in the solution
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