Q. 28

# If (x + a) is a factor of 2x2 + 2ax + 5x + 10, find a.

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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