Write a quadratic equation and solve it by completing the square. Show your work.

Let the quadratic equation be  

Step 1: Take the coefficients of the term and divide the entire equation

Here the coefficient of is 2

So  dividing the entire equation by 2, we get

Step 2:  Move the constant term to the right side of the equation

Step 3: Complete the square on the left side of the equation and balance this by adding the same number to the right side of the equation

=   =  =  9

Step 4: Take the square root on both sides of the equation

Step 5 Subtract 3 from both sides:

x =  2.45 - 3   or x = -2.45 - 3

x = - 0.55  or  x = -5.45

what is the approximate angle of acb if abc is 25cm and the length of segment bc is 15

step-by-step explanation: