Answer to Question #135729 in Calculus for Everlyn

Question #135729
y=5x^3+0x^2+x+7
Choose one integer from the following set: -5 ≤ x ≤ 5. State the integer you chose.
When using long division, what binomial would you divide by to determine if your chosen integer from part b is a zero for your polynomial?
Do the long division you just described in part c.
Write the answer to the long division problem in the form .
Is your integer from part b a zero of your polynomial? How you can tell from the long division work.
1
Expert's answer
2020-09-30T15:52:42-0400

"(a)\\\\ y = 5x^3 + 0x^2 + x + 7\\\\\n\n(b)\\\\\n\n\\textsf{I choose}\\hspace{0.1cm}\\textit{ x = 3}\\\\\n\n\n(c)\\\\ \n\n\\textsf{If} \\hspace{0.1cm}\\textit{3}\\hspace{0.1cm} \\textsf{is a zero of}\\hspace{0.1cm} y,\\\\ \\textsf{then}\\hspace{0.1cm} \\textit{x - 3}\\hspace{0.1cm} \\textsf{would be a factor of}\\hspace{0.1cm} y,\\\\\\textsf{which implies that the}\\\\\\textsf{binomial to divide}\\\\\\hspace{0.1cm}y \\hspace{0.1cm}\\textsf{intended to give a remainder}\\\\\\textsf{of zero is}\\hspace{0.1cm}\\textit{ x - 3.}\\\\\n\n(e) \\textsf{Answer: the remainder is}\\hspace{0.1cm} \\textit{145}\\\\\n\n\n(f) \\textsf{No, the integer from part }\\hspace{0.1cm} b\\\\\\textsf{is not a zero of the polynomial,}\\\\ \\textsf{because the remainder after}\\\\\\textsf{the long division is not equal to}\\hspace{0.1cm} \\textit{0}."


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