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3 years ago

Find all roots of the polynomial function f(x) = 2x^4-x^3-13x^2+5x+15

Mathematics

2 answers:

Simora [160]3 years ago

7 0

Answer:

Roots are : 1, -7 and -7

Step-by-step explanation:

When we put x = -1 in F(x) it is equal to 0

Thus, (x + 1) is factor of given function.

When we divide F(x) by (x + 1) it gives the value (x² - 6x - 7)

factorizing the work x² - 6x - 7 by middle term splitting.

> x² - 6x - 7 = x² - 7x + x - 7

> x(x - 7) + 1(x - 7)

> (x + 1) (x - 7)

then, x³ - 5x² - 13x - 7 = (x + 1)(x + 1)(x - 7)

x = -1, -1, 7 the factor.

D and C is the answers.

Step-by-step explanation:

sweet [91]3 years ago

3 0

1 -7 7

Hope this helps you out

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2 years ago

A bag grass seed covers 3750 square feet and costs $27.50. If a gardener is reseeding a city park that has the shape of a right

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Answer:

C = (13.75 * B * H)/3750

Step-by-step explanation:

The area of a triangle is represented by the equation A = 1/2 * B * H

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3 years ago

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Simplifly the expression 5^0

Angelina_Jolie [31]

ANY number raised to the zero power is ' 1 '.

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So 5^0 = 1 .

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3 years ago

Circle A is shown. Secant W Y intersects tangent Z Y at point Y outside of the circle. Secant W Y intersects circle A at point X

timama [110]

Circle A is missing, so i have attached it.

Answer:

∠XYZ = 35°

Step-by-step explanation:

We want to find the angle ∠XYZ in the image attached.

To solve that, we will use the formula in the theorem for angle formed by secants or tangents. Thus;

∠XYZ = ½(arc WZ - arc XZ)

From the image, arc WZ = 175° and arc XZ = 105°

Thus;

∠XYZ = ½(175 - 105)

∠XYZ = ½(70)

∠XYZ = 35°

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