Fill in the blanks with numbers to make a true equation. 3x^2 + 12x - 4 - 2x^2 + 6x + 7 = ___ (x + ___ )^2 + ___
3x^2 + 12x - 4 - 2x^2 + 6x + 7 = ___ (x + ___ )^2 + ___
x^2 + 18x + 3 complete the square on x
x^2 + 18x + 81 + 3 - 81
(x + 9)^2 - 78
first blank = 1
second blank = 9
third blank = -78
+842 
