fill in the blank t0 complele ihc square x 18x 19 0 sul 18x x2 ax 12 sol x 4x 12 x l 16 v2y7 x2

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Fill in the blank to complete the square: x^2 + 18x - 19 = 0 Solution: x^2 + 18x + 81 = 19 + 81 (x + 9)^2 = 100 âˆš(x + 9)^2 = âˆš100 x + 9 = Â±10 x = -9 Â± 10