Complete the Square: x^2+6x=7

X^2+6x=7 Half the middle term which 6. And square the result 6/2 =3 3^2 =9 This 9 will be added in the left side after the 6x. And also to be added at the right side. Because there is a rule that what you did in left side is you need to to in the right side to be equal. X^2+6x + 9 = 7 + 9 Convert the left side equation into squared and the other side add the two numbers (X+3)^2 = 16 Squared both sides to remove tye 2 X+3 = + and - 4 You need to right two signs