Question

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

Answer 1

Step-by-step explanation:

Given: 2x 2+x−a=5

⇒2(0) 2 +0−a=5 [Putting x=0]

⇒0+0−a=5

⇒a=−5

Hence, the value of a is −5.

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Answer 2

Answer:

X=2

Then, (2×2²) +2-a=5

(2×4) +2-a=5

8+2-a=5

10-a=5

10-5=a

5=a

Therefore a=5

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