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If (x + a) is a factor of (2x2 + 2ax + 5x + 10), then find the value of a. |
Answer» Given: (x + a) is a factor of 2x2 + 2ax + 5x + 10 We have x + a = 0 ⇒ x = –a Since, (x + a) is a factor of 2x2 + 2ax + 5x + 10 Hence, It will satisfy the above polynomial ∴ 2(–a)2 + 2a(–a) + 5(–a) + 10 = 0 ⇒ –5a + 10 = 0 ⇒ a = 2 |
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