find 'a' if the two polynomials
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Step-by-step explanation:
gives same remainder when are divide by x+3
hence put x=-3...and equate equations
a( - 3) {}^{3} + 3( - 3) {}^{2} - 9 = 2( - 3) {}^{3} + 4( - 3) + a \\ - 27a + 27 - 9 = - 54 - 12 + a \\ - 28a = - 66 + 9 - 27 \\ - 28a = - 66 - 18 \\ a = 3
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