Can you help to solve for number 5. Solving for X.

We will work at first with the small triangle ADC

mmWe will use the sine rule

By using the cross multiplication

In triangle ABD

We will use

Then

Substitute AD by its value above

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.

12.5 feet

step-by-step explanation: