3 years ago

Find all roots: x^3-7x^2-12x = 0

Mathematics

1 answer:

Pepsi [2]3 years ago

5 0

Answer:

The roots are 0, 3 and 4.

Step-by-step explanation:

x^3-7x^2-12x = 0 Take out x:

x(x^2 - 7x - 12) = 0 Factor the expression in the brackets:

x(x - 3)(x - 4) = 0

x = 0 or x - 3 = 0 or x - 4 = 0, so

The roots are 0, 3 and 4.

You might be interested in

Calculate the lateral surface area of the rectangular prism:

bekas [8.4K]

Find the area of all six rectangular faces of the prism. (A= l x b)

A1: 3.1 x 5 = 15.5
A2: 7.4 x 3.1 = 22.94
A3: 5 x 7.4 = 37
A4: 3.1 x 7.4 = 22.94
A5: 7.4 x 5 = 37
A6: 3.1 x 5 = 15.5

Add all answers together to get your answer of 150.88 cm^2.
Hope this helps!!

8 0

3 years ago

Find the determinant of the given matrix. -42 or -22 or 22 or 42

Maksim231197 [3]

Answer:

-42

Step-by-step explanation:

Cross multiply

5 * -2 = -10

8 * 4 = 32

-10 - 32 = -42

5 0