Question

what should be the value of a if the value of 2x^2+x-a equalsto 5 when x=-2​

Answer 1

Answer:

2x^2+x-a=5

2×-2^2+x-a=5

2×4-2-a=5

8-2-a=5

6-a=5

-a=5-6

-a=-1

so,a=1

Answer 2

Answer:

see the attachment.

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