Which of the following correctly completes the square for the equation below? x2 + 4x = 27 a. (x + 4)2 = 43 b. (x + 4)2 = 31 c. (x + 2)2 = 31 d. (x + 2)2 = 43

Solution: x2+4x=276x=27,x=9/2answer: no

It's like discovering the answer to a puzzle. the purpose in solving an equation is to find the value or values of the variable that makes it a true statement. any value of the variable that makes the equation true is called a solution to the equation.