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Math
Posted over 2 years ago

Use Synthetic Division to determine each quotient. Then use the quotients to write the dividend in factored form and list all the zeros. (x4−5x2+4)÷(x+2)\left(x^{4}-5 x^{2}+4\right) \div(x+2)

Quotient
Factored Form:
Zeros:
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Answer from Sia
Posted over 2 years ago
Solution by Steps
step 1
To determine the quotient using Synthetic Division, we start with the polynomial x4−5x2+4x^4 - 5x^2 + 4 and divide it by x+2x + 2
step 2
Set up the synthetic division by writing the coefficients of x4−5x2+4x^4 - 5x^2 + 4: [1,0,−5,0,4][1, 0, -5, 0, 4]
step 3
Write the divisor x+2x + 2 as −2-2 and perform the synthetic division:
step 4
−210−504−242−41−2−120 \begin{array}{r|rrrrr} -2 & 1 & 0 & -5 & 0 & 4 \\ & & -2 & 4 & 2 & -4 \\ \hline & 1 & -2 & -1 & 2 & 0 \\ \end{array} The quotient is x3−2x2−x+2x^3 - 2x^2 - x + 2 and the remainder is 00
step 5
Since the remainder is 00, we can write the polynomial as x4−5x2+4=(x3−2x2−x+2)(x+2)x^4 - 5x^2 + 4 = (x^3 - 2x^2 - x + 2)(x + 2)
step 6
To factor x4−5x2+4x^4 - 5x^2 + 4 completely, we factor x3−2x2−x+2x^3 - 2x^2 - x + 2 further:
step 7
x3−2x2−x+2=(x−1)(x+1)(x−2) x^3 - 2x^2 - x + 2 = (x - 1)(x + 1)(x - 2) Thus, x4−5x2+4=(x−1)(x+1)(x−2)(x+2) x^4 - 5x^2 + 4 = (x - 1)(x + 1)(x - 2)(x + 2)
step 8
The zeros of the polynomial are the solutions to (x−1)(x+1)(x−2)(x+2)=0(x - 1)(x + 1)(x - 2)(x + 2) = 0, which are x=1,−1,2,−2x = 1, -1, 2, -2
Answer
Quotient: x3−2x2−x+2x^3 - 2x^2 - x + 2
Factored Form: (x−1)(x+1)(x−2)(x+2)(x - 1)(x + 1)(x - 2)(x + 2)
Zeros: x=1,−1,2,−2x = 1, -1, 2, -2
Key Concept
Synthetic Division
Explanation
Synthetic Division is a simplified method of dividing a polynomial by a binomial of the form x−cx - c. It is particularly useful for finding the quotient and remainder quickly.

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