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. Let g(x)=-5x^4-2x^3+9x^2-8x+C for some constant C.Find the value of C so that x-1 is a factor of g.

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. Let g(x)=-5x^4-2x^3+9x^2-8x+C
for some constant C.Find the value of C so
that x-1 is a factor of g.

. Let g(x)=-5x^4-2x^3+9x^2-8x+C for some constant C.Find the value of C so that x-1 is a factor of g.

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PhillipMaster · Tutor for 5 years

Answer

If \(x - 1\) is a factor of \(g(x)\), then \(g(1)\) must be equal to 0 (by the Factor Theorem). Substitute \(x = 1\) into \(g(x)\):\(g(1) = -5(1)^4 - 2(1)^3 + 9(1)^2 - 8(1) + C = 0\)Solving this gives:\(-5 - 2 + 9 - 8 + C = 0\)\(-6 + C = 0\)So, \(C = 6\).
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