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After simplification, which of the following equations does not remain a quadratic equation in x?
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Answer and explanation
Correct answer: \((x+1)^2=x^2+4x\)
In option C, expanding gives \(x^2+2x+1=x^2+4x\). The \(x^2\) terms cancel, leaving \(2x-1=0\), which is linear. Exam tip: simplify fully and then check the highest power of x.
Frequently asked questions
What is the correct answer to this question?
\((x+1)^2=x^2+4x\)
Why is this the correct answer?
In option C, expanding gives \(x^2+2x+1=x^2+4x\). The \(x^2\) terms cancel, leaving \(2x-1=0\), which is linear. Exam tip: simplify fully and then check the highest power of x.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Quadratic Equations. Topic: Introduction to Quadratic Equations.
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