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Precalculus Section 2.5 Approximate real roots of polynomials using graphing calculators

Precalculus Section 2.5 Approximate real roots of polynomials using graphing calculators. Note: The solution to x 2 + 2x – 8 = 0 is found by (x+4)(x-2) =0, x = -4 and x = 2. . The roots are the x intercepts of y = x 2 + 2x – 8.

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Precalculus Section 2.5 Approximate real roots of polynomials using graphing calculators

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  1. Precalculus Section 2.5Approximate real roots of polynomials using graphing calculators Note: The solution to x2 + 2x – 8 = 0 is found by (x+4)(x-2) =0, x = -4 and x = 2. The roots are the x intercepts of y = x2 + 2x – 8. To find the real roots of a polynomial, graph the polynomial function and find its x intercepts.

  2. Solve x3 – 3x + 1 = 0

  3. Solve x3 – x2 – 5x+2 = 0

  4. Solve x4 – 2x3 – 7x2 + 10x + 10 = 0

  5. assignment • Page 78 • Problems 1 – 8, 16

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