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simonthang8
14.01.2020 •
Mathematics
What is the solution of the equation? (√2x-1) + 2=x
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Ответ:
x = 5
Step-by-step explanation:
√(2x − 1) + 2 = x
√(2x − 1) = x − 2
2x − 1 = (x − 2)²
2x − 1 = x² − 4x + 4
0 = x² − 6x + 5
0 = (x − 1) (x − 5)
x = 1 or 5
Check for extraneous solutions.
√(2(1) − 1) + 2 = 1
√(1) + 2 = 1
3 = 1
No solution
√(2(5) − 1) + 2 = 5
√(9) + 2 = 5
5 = 5
x = 5
Ответ:
-6
Step-by-step explanation:
since it has to be a negative because Negative × negative = positive, then it has to be X= -6,