If using the method of completing the square to solve the quadratic equation x^2+11x+39=0x 2 +11x+39=0, which number would have to be added to "complete the square"?

554.4

step-by-step explanation:

44*12.6=544.4

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

m=11 hope this

step-by-step explanation: