Answer:
The solutions of the original equation are x=-5 and x=-2
Step-by-step explanation:
we have

Let

Rewrite the equation

Complete the square



rewrite as perfect squares

square root both sides




the solutions are
u=-2,u=1
<em>Alternative Method</em>
The formula to solve a quadratic equation of the form
is equal to
in this problem we have

so
substitute in the formula
the solutions are
u=-2,u=1
<em>Find the solutions of the original equation</em>
For u=-2
----> 
For u=1
----> 
therefore
The solutions of the original equation are
x=-5 and x=-2
Answer: 9
Step-by-step explanation:
Given
The function is 
To make it a perfect square, compare it with 
Here,

So, c must be square of b i.e. 9

Therefore, value of c is 9.
Step-by-step explanation:
la carretilla estaba a unos 15 metros de altura
The diameter would be twice 5, or 10