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Answer :
Answer:
Down below (I believe there may be a typo in answer choice D. I think it's supposed to be 5x^3 + 5x^2. The typo being the three shown in the answer choice.
Step-by-step explanation:
First, distribute 5 to the (x - 3)
(5x - 15)
Then, distribute (5x - 15) to (x^2 + 4x + 1)
5xx^2 + 5x * 4x + 5x * 1 - 15x^2 - 15 * 4x - 15 * 1
Simplify:
5x^3 + 5x^2 - 55x - 15
Hope this helps!
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Rewritten by : Barada
[tex]\bf 5(x-3)(x^2+4x+1) \\\\[-0.35em] ~\dotfill\\\\ \begin{array}{llll} x-3\\ \times ~~5\\ \cline{1-1} 5x-15 \end{array}\qquad \qquad \begin{array}{llll} x^2+4x+1\\ \times ~~5x-15\\ \cline{1-1} 5x^3+20x^2+5x\\ -15x^2-60x-15 \end{array} \\\\\\ 5(x-3)(x^2+4x+1)\implies 5x^3+20x^2+5x-15x^2-60x-15 \\\\\\ 5x^3+20x^2-15x^2+5x-60x-15\implies 5x^3+5x^2-55x-15[/tex]
