# SOLUTION: f(x) = x^3 + 2x^2 – 5x – 10. Find a bound for the real zeros of f and graph f (x) and find all real zeros of the function. Approximate all irrational zeros rounded to two dec

Algebra ->  Algebra  -> Real-numbers -> SOLUTION: f(x) = x^3 + 2x^2 – 5x – 10. Find a bound for the real zeros of f and graph f (x) and find all real zeros of the function. Approximate all irrational zeros rounded to two dec      Log On

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 Algebra: Real numbers, Irrational numbers, etc Solvers Lessons Answers archive Quiz In Depth

 Question 383381: f(x) = x^3 + 2x^2 – 5x – 10. Find a bound for the real zeros of f and graph f (x) and find all real zeros of the function. Approximate all irrational zeros rounded to two decimal places.Answer by Fombitz(13828)   (Show Source): You can put this solution on YOUR website! . . . The real zeros lies between (,). . . . . . . Looks like is a zero. Verify using the equation, . . Since is a zero, then is a factor. . . Use polynomial long division to find the other quadratic factor, ``` x^2 - 5 __________________________ x + 2 | x^3 + 2x^2 - 5x - 10 - (x^3 + 2x^2) --------------------- - 5x - 10 - (- 5x - 10) ------------- 0 ``` . . . . For the quadratic equation, You can approximate those zeros with a calculator to the desired number of decimal places.