Ex.12.3 Q9 Algebraic Expressions Solution - NCERT Maths Class 7

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Question

 What should be the value of \(a\) if the value of \(2x^2 + x – a\) equals to \(5\), when \(x = 0\)?

Text Solution

Steps:

Given that

\(2x^2 + x – a = 5\)

Also, value of \(x\) is \(0\)

\[\begin{align}{\rm{ So, }} \,\,\,\,\,2 \times {0^2} + 0 - a &= 5\\ 0- a &= 5\\ - a &= 5\\{\rm{ Ans: }}\; a &= - 5\end{align}\]