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If px squar +3x+q=0 has two roots x=-1,x=-2,find p-q |
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Answer» Nice px2 + 3x + q = 0x = 1p + 3 + q = 0p + q = -3 .......... (i)x = -2p(-2)2 + 3(-2) + q = 04p - 6 + q = 04p + q = 6 ........... (ii)Subtract (i) and (ii)3p = 9p = 9/3 = 3Put it in (i)3 + q = -3q = -3 -3q = -6 |
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