What number must i add to complete the square x^2+12x=40

a

step-by-step explanation:

“a term can be a signed number, a variable, or a constant multiplied by a + sign or j sign. in , the terms are 5x , 3y and 8. when a term is made up of a constant multiplied by a variable or variables, that constant is called a coefficient.” i hope this you.

c

step-by-step explanation:

b.   e = 7.5h

hope this , lovely!