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CBSE Class 10 Answered

If (x + a) is a factor of 2x2 + 2ax + 5x + 10, find a.
Asked by dearsir | 04 Mar, 2019, 09:19: PM
answered-by-expert Expert Answer
f(x) = 2x2 + 2ax + 5x +10 = 0
 
if (x+a) is factor, then we have  f(-a) = 2 a2 +2a(-a) +5(-a) +10 = 0  or   a = 2
Answered by Thiyagarajan K | 04 Mar, 2019, 11:31: PM

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