caleb19moody
24.01.2020 •
Mathematics
Solve −2x2 − 16x − 44 = 0.
x = -8 plus or minus "i" times the square root of 6
x = -8 plus or minus "2i" times the square root of 6
x = -4 plus or minus "i" times the square root of 6
x = -4 plus or minus "2i" times the square root of 6
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Ответ:
Answer
x = -4 plus or minus "i" times the square root of 6
Explanation
−2x² − 16x − 44 = 0.
−2x² − 16x = 44
Dividing by -2
x² + 8x = -22
x² + 8x + 4² = -22 + 4²
(x + 4)² = -22 + 16
(x + 4) ² = -6
(x + 4) = √-6
Remember √(-1) = i
(x + 4) = i√6 or (x + 4) = -i√6
x = -4 + i√6 x = -4 - i√6
Ответ:
3
Step-by-step explanation:
Radian= arc/radius
18/6=3