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Mathematics
Darion
16 September, 15:56
Complete the square for 5x^2-30x=5
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Kristen Shepard
16 September, 16:05
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Answer: (x-3) ^2=10
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Sharon Mullen
16 September, 18:53
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Solve for x over the real numbers: by completing the square:
5 x^2 - 30 x = 5
Divide both sides by 5:
x^2 - 6 x = 1
Add 9 to both sides:
x^2 - 6 x + 9 = 10
Write the left hand side as a square:
(x - 3) ^2 = 10
Take the square root of both sides:
x - 3 = sqrt (10) or x - 3 = - sqrt (10)
Add 3 to both sides:
x = 3 + sqrt (10) or x - 3 = - sqrt (10)
Add 3 to both sides:
Answer: | x = 3 + sqrt (10) or x = 3 - sqrt (10)
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