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3 years ago

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Solve −3x2 + 30x − 90 = 0. x equals 5 plus or minus 2i square root of 5 x equals 5 plus or minus i square root of 5 x equals 10

plus or minus 2i square root of 5 x equals 10 plus or minus i square root of 5

2 answers:

Tcecarenko [31]3 years ago

5 0

The x in your equation is 16/5 or 3 1/5 or 3.2 if you want it simplified

aliina [53]3 years ago

5 0

Answer:

x = 5 +/-<em> i</em> √5

(took the test just now)

Hope this helps !

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${x}^{2} + {(y - k)}^{2} = 21 \\ or \: {x}^{2} + {y}^{2} - 2ky + {k}^{2} - 21 = 0 \\ by \: compairing \:it \: with \: \\ {x}^{2} + {y}^{2} + 2gx + 2fy = 0 \: we \: get \\ g = 0 \\f = - k \\ c = {k}^{2} - 21$

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3 years ago