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in Polynomials by (36.4k points)
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If (x + a) is a factor of 2x2 + 2ax + 5x + 10, find a.

1 Answer

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Best answer

Given,

2x2 + 2ax + 5x + 10

Factor = (x + a)

Now by using factor theoram we get,

f( – a) = 2a2 – 2a2 – 5a + 10 = 0

– 5a + 10 = 0

a = 2

Therefore the value of a = 2

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