How do we complete the square with questions involving a number stuck with the x-squared?

Let me show you an example:Complete the square for the following equation....4x²+ 8x - 91) Divide the whole equation by 4, as this is the easiest way to make things simple. It allows us to complete the square in a much simpler format.(4x²+ 8x - 9) / 4 = x²+ 2x - 9/42) With this equation, complete the square.x²+ 2x - 9/4 —> (x+1)²-9/4-1 = (x+1)²-13/43) Now simply multiply all components by 4, to get the final answer.( (x+1)²-13/4 ) x 4 = 4(x+1)² - 13The final answer to this tricky question is 4(x+1)²- 13 :)