find the roots of the polynomial equation -x^3+5x^2 - 11x+55=0

Question

02-02-2016
Mathematics

contestada

find the roots of the polynomial equation -x^3+5x^2 - 11x+55=0

Respuesta :

Otras preguntas

Question Write an equation of a line that passes through the point (4,3) and is perpendicular to the graph of the equation y=−1/3+4

What do you think influences how fast a river flows?

Simplify -7 1/8 - (-9 1/2)

Find the measure of the missing angle in this triangle.

I went to the store with $20. After buying all my groceries, I spent $15.87. How much money do I have left?

What is kyphosis caused by?

find the slope of the line that passes through the pints (2,7) and (2,6)

1: The number of hours, h, spent studying and the score s, on a test (find the independent variable and the dependent variable.

evaluate the extent to which political parties contributed to fostering change with regard to national unity

Panoyin Panoyin · Answer 1 · 2016-02-02T00:28:59+01:00

  x³ + 5x² - 11x + 55 = 0
x²(x) + x²(5) - 11(x) - 11(5) = 0
  (x²(x + 5) - 11(x + 5) = 0
(x² - 11)(x + 5) = 0
x² - 11 = 0     or        x + 5 = 0
+ 11 + 11 - 5 - 5
x² = 11 or x = -5
  x = ±√(11) or x = -5

THere are three roots in the polynomial equation.