Sara needs 5 and 2/3 cups of sugar to make cookies for the bake sale. She has used 3 and 4/5 cups of sugar so far. How much more does she need?

(x) - (y) = (1 + 4i)

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629