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The problem states that h(-(1)/(2)) = 0. According to the Factor Theorem, if h(c)=0, then (x-c) is a factor of h(x).

Mathematics

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Answer

(2x+1)(2x2+x+36)(2x+1)(2x^2+x+36)

Step-by-step solution

3 steps
  1. Use the Factor Theorem to confirm the given root.

    The problem states that h(−12)=0h\left(-\frac{1}{2}\right) = 0. According to the Factor Theorem, if h(c)=0h(c)=0, then (x−c)(x-c) is a factor of h(x)h(x).
    Here, c=−12c = -\frac{1}{2}, so (x−(−12))=(x+12)\left(x - \left(-\frac{1}{2}\right)\right) = \left(x + \frac{1}{2}\right) is a factor.
    To avoid fractions, we can multiply this factor by 2, which means (2x+1)(2x+1) is also a factor.

    Let's verify h(−12)h\left(-\frac{1}{2}\right):

    h(−12)=4(−12)3+4(−12)2+73(−12)+36h\left(-\frac{1}{2}\right) = 4\left(-\frac{1}{2}\right)^3 + 4\left(-\frac{1}{2}\right)^2 + 73\left(-\frac{1}{2}\right) + 36 h(−12)=4(−18)+4(14)−732+36h\left(-\frac{1}{2}\right) = 4\left(-\frac{1}{8}\right) + 4\left(\frac{1}{4}\right) - \frac{73}{2} + 36 h(−12)=−12+1−732+36h\left(-\frac{1}{2}\right) = -\frac{1}{2} + 1 - \frac{73}{2} + 36 h(−12)=12−732+36h\left(-\frac{1}{2}\right) = \frac{1}{2} - \frac{73}{2} + 36 h(−12)=−722+36h\left(-\frac{1}{2}\right) = -\frac{72}{2} + 36 h(−12)=−36+36=0h\left(-\frac{1}{2}\right) = -36 + 36 = 0

    This confirms that (2x+1)(2x+1) is a factor of h(x)h(x).

  2. Divide the polynomial h(x)h(x) by (2x+1)(2x+1) to find the other factor.

    We can use polynomial long division:

    \multicolumn2r2x2+x+36\cline2−52x+14x3+4x2+73x+36\multicolumn2r−(4x3+2x2)\cline2−3\multicolumn2r02x2+73x\multicolumn2r−(2x2+x)\cline3−4\multicolumn2r072x+36\multicolumn2r−(72x+36)\cline4−5\multicolumn2r00\begin{array}{c|cc cc} \multicolumn{2}{r}{2x^2} & +x & +36 \\ \cline{2-5} 2x+1 & 4x^3 & +4x^2 & +73x & +36 \\ \multicolumn{2}{r}{-(4x^3} & +2x^2) \\ \cline{2-3} \multicolumn{2}{r}{0} & 2x^2 & +73x \\ \multicolumn{2}{r}{} & -(2x^2 & +x) \\ \cline{3-4} \multicolumn{2}{r}{} & 0 & 72x & +36 \\ \multicolumn{2}{r}{} & & -(72x & +36) \\ \cline{4-5} \multicolumn{2}{r}{} & & 0 & 0 \\ \end{array}

    The quotient is 2x2+x+362x^2 + x + 36.
    So, h(x)=(2x+1)(2x2+x+36)h(x) = (2x+1)(2x^2 + x + 36).

  3. Attempt to factor the quadratic term 2x2+x+362x^2 + x + 36.

    We check the discriminant Δ=b2−4ac\Delta = b^2 - 4ac for the quadratic ax2+bx+cax^2+bx+c.
    For 2x2+x+362x^2 + x + 36, we have a=2a=2, b=1b=1, c=36c=36.

    Δ=(1)2−4(2)(36)\Delta = (1)^2 - 4(2)(36) Δ=1−288\Delta = 1 - 288 Δ=−287\Delta = -287

    Since the discriminant Δ<0\Delta < 0, the quadratic factor 2x2+x+362x^2 + x + 36 has no real roots and cannot be factored further into linear factors with real coefficients.

    Therefore, the factorization of h(x)h(x) over real numbers is:

    (2x+1)(2x2+x+36)(2x+1)(2x^2+x+36)
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