3x^2 - 4x + 7 (Find the domain of the expression)

Question

asked Feb 23, 2018 221k views

1 Answer

Will Goodhew · Answer 1 · 2018-03-02T10:51:30+0000

x1 = −(−4) − √ (−4)2 − 4×3×7 2×3 = 4 − 2 × √ 17 i 6 ≈ 0.666667 − 1.374369ix2 = −(−4) + √ (−4)2 − 4×3×7 2×3 = 4 + 2 × √ 17 i 6 ≈ 0.666667 + 1.374369i