SOLUTION: x^2-4x+2=0

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Question 168902: x^2-4x+2=0
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2-4x%2B2=0
Remember ----> system%28a=1%2Cb=-4%2Cc=2%29
Via Pyth. Theorem:
x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x=%28-%28-4%29%2B-sqrt%28-4%5E2-4%2A1%2A2%29%29%2F%282%2A1%29
x=%284%2B-sqrt%2816-8%29%29%2F2=%284%2B-sqrt%288%29%29%2F2=%284%2B-2.8284%29%2F2
2 values:
x=%284%2B2.8284%29%2F2=6.8284%2F2=highlight%283.4142%29
x=%284-2.8284%29%2F2=2.8284%2F2=highlight%281.4142%29
Let's check, use x=3.4142
3.4142%5E2-4%283.4142%29%2B2=0
11.65676-13.6568%2B2=0
-2.00004%2B2=0
0.00004=0, close enough amigo (rounding off)
Thank you,
Jojo