Complete the steps of the derivation of the quadratic formula. step 2: step 3: step 4: step 5:

To complete the derivation of the quadratic equation:

Given:

Add both sides we have;

Taking square root both sides we have;

⇒

⇒

Subtract from both sides we have;

Therefore, complete derivation for the quadratic equation is:

Step 1.

Step 2.

Step 3.

Step 4.

Step 5.

or

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

c.

step-by-step explanation: