Question

What should be the value of a if the value of 2x² + x – a equals to 5, when x = 0?

Answer 1

$<b><u>$Given Equation = 2x² + x – a equals to 5

= 2x² + x – a = 5

Given value of x = 0

so

A/Q

$2( {0})^{2} + 0 - a = 5 \\ \\ 0 + 0 - a = 5 \\ \\- a = 5\\ \\ a = - 5$

The value of a is $\bold{-5}$

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Answer 2

The value of a = - 5

Given :

The value of 2x² + x – a equals to 5 when x = 0

To find :

The value of a

Solution :

Step 1 of 3 :

Write down the given expression

The given expression is 2x² + x – a

Step 2 of 3 :

Find the value of the expression for x = 0

Putting x = 0 in the given expression we get

= 2 × 0² + 0 – a

= 0 + 0 - a

= - a

Step 3 of 3 :

Find the value of a

By the given condition

- a = 5

⇒ a = - 5

Hence the required value of a = - 5

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