Fill in the blanks with numbers to make a true equation. 3x^2 + 12x - 4 - 2x^2 + 6x + 7 = ___ (x + ___ )^2 + ___
Combine like terms on the left x2 + 18x + 3 = (x + )2 +
Complete the square on the left ( x2 + 18x + 81) – 78 = 1 (x + 9 )2 + –78
.
+456 
