To solve the equation \(8x^2=72\), which equation is obtained first after simplifying both sides?
Answer and explanation
Correct answer: \(x^2=9\)
Dividing both sides of \(8x^2=72\) by 8 gives \(x^2=9\). Taking square roots then gives \(x=\pm3\). Option B is incorrect because 72 has not been divided by 8. In an exam, first remove the coefficient of \(x^2\) by performing the same operation on both sides.
Frequently asked questions
What is the correct answer to this question?
\(x^2=9\)
Why is this the correct answer?
Dividing both sides of \(8x^2=72\) by 8 gives \(x^2=9\). Taking square roots then gives \(x=\pm3\). Option B is incorrect because 72 has not been divided by 8. In an exam, first remove the coefficient of \(x^2\) by performing the same operation on both sides.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Quadratic Equations. Topic: Methods of Solving Quadratic Equations.
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