Recognize Quadratic Expression: Recognize the quadratic expression x2+12x+36 as a perfect square trinomial.Calculate the factors of the constant term (36) that add up to the coefficient of the x term (12).
Calculate Factors: Notice that 6+6=12 and 6×6=36. Write the expression as (x+6)(x+6) or (x+6)2.
Write as Perfect Square Trinomial: Check the factoring by expanding (x+6)2 to ensure it equals the original expression.(x+6)2=x2+2⋅6⋅x+62=x2+12x+36, which matches the original expression.