Answer the attached question by selecting of the the given answers.

The correct answer is option D.  [3x² + 7x + 21]/3x²

Step-by-step explanation:

Perimeter of a triangle = sum of all sides

To find the perimeter of triangle

Here sides are,

7/x² , 1/3x and (x + 2)/x

Perimeter = 7/x² + 1/3x + (x + 2)/x

Here LCM = 3x²

Perimeter = (7 * 3)/3x² + (1 * x)/3x² + (x + 2)3x/3x²

 = [21 + x + 3x² +6x]/3x²

 = [3x² + 7x + 21]/3x²

The correct answer is option D.  [3x² + 7x + 21]/3x²

so, Option D is correct.

Step-by-step explanation:

Perimeter of triangle = Sum of all sides

Perimeter of triangle = a+ b+ c

a= 1/3x, b= x+2/x and c = 7/x^2

LCM of 3x, x and x^2 : 3x^2

So, so, Option D is correct.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

536

step-by-step explanation: