x^2 + 8x - 345
x1,2 = -4 +- 1/2√(64 + 4*345) = -4 +- 19 = {-23, 15}
x^2 + 8x - 345 = (x + 23)(x - 15)
x^2 + 8x - 345
x1,2 = -4 +- 1/2√(64 + 4*345) = -4 +- 19 = {-23, 15}
x^2 + 8x - 345 = (x + 23)(x - 15)