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If x+a is factor of 2x2+2ax+5x+10, find a |
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Answer» x + a is factor x = -a2x2 + 2ax + 5x + 10 =02(-a)2 + 2 a(-a) + 5(-a) + 10 = 02a2 - 2a2 - 5a + 10 = 0- 5a + 10 = 0- 5a = -10a = 10/5a = 2 1 |
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