SOLUTION: using your calculator find the one real possitive solution to the equation x^3+5x^2-7=0 round oyur answer to the nearest hundreth

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Question 392830: using your calculator find the one real possitive solution to the equation x^3+5x^2-7=0 round oyur answer to the nearest hundreth
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Always helps to graph the polynomial so you know what you're looking at. We have the graph:

graph%28300%2C+300%2C+-10%2C+10%2C+-10%2C+10%2C+x%5E3+%2B+5x%5E2+-+7%29

The positive real solution appears to be approximately 1, so if you have a TI calculator, use nsolve:

nsolve(x^3 + 5x^2 - 7 = 0, x, 1)

Another way you could solve it using a calculator is via Newton's Method, which uses a recursive sequence to approximate the zero.