CBSE Class 10 Answered
2. If (x + a) is a factor of 2x2 + 2ax + 5x + 10, find a.
Asked by jaiacharya18 | 17 Feb, 2019, 10:44: AM
Expert Answer
f(x) = 2x2 + 2ax +5x +10 = 0
if (x+a) is a factor, then f(-a) = 0
hence, f(-a) = 2(-a)2 +2a(-a) +5(-a) +10 = 0 or a = 2
Answered by Thiyagarajan K | 17 Feb, 2019, 11:55: AM
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