Q: What is the root of this polynomial x3-6x2 plus 4x plus 15?

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x² + 8x + 15 = (x + 5)(x + 3)

5(x + 3)

2x3 + x2 + 15 This is a 3rd order polynomial in 'x'. It's numerical value kinda depends on the value of 'x'.

According to the rational root theorem, which of the following are possible roots of the polynomial function below?F(x) = 8x3 - 3x2 + 5x+ 15

15

15

sqrt(15) + sqrt(25) = 5 + sqrt(15) = 8.873 (using principal roots only).

(X minus the cube root of fifteen) times (x squared plus the cube root of fifteen plus fifteen to the two thirds power)

-2(2x^4 - 13x^3 + 15)

x2 + 18x + 45 = (x + 15)(x + 3).

x = 3

F(x) = 15x2 - 2.5 + 3 That's a quadratic or 2nd degree polynomial in x.

Assuming that he quadratic is 2x^2 + x - 15, the quotient is 2x - 5.

It equals 285

(x-3) (x+5)

The factors are : (xÂ² + 3) and (x + 5). Here's how I got that: I plotted it and found it crosses the x-axis at x = -5. Substituting x = -5 verifies that -5 is a root. So one of the factors is (x + 5). Using long division: (xÂ³ + 5xÂ² + 3x + 15)/(x+5) = xÂ² + 3.

-4 plus/minus square root of 15.

If you mean vertices of (-1, 4) (2, 7) and (1, 5) then it is an isosceles triangle with a perimeter of square root of 18 plus square root of 5 plus square root of 5 which is about 8.715 rounded to three decimal places.

x2+xx = 15 Which is the same as: x2+x2 =15 2x2 = 15 x2 = 7.5 x = the square root of 7.5

15 x 6 or the long way is 90

there is no root

(4x + 5)(x - 3)

(16 plus 15) plus 15 = 46

(square root of) 15 / 9 is the answer

15 is the square root of 225 (15 x 15 = 225).

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