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( x - √2 )( x + √2 ) + 3( x - 1 )² = ½( 8x² - 2 ) + x
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( x - √2 )( x + √2 ) + 3( x - 1 )² = ½( 8x² - 2 ) + x
x²-2+3x²-6x+3=4x²-1+x
-6x+1=-1+x
2=7x
x=2/7
Pozdrawiam Aniela
( x - √2 )( x + √2 ) + 3( x - 1 )² = ½( 8x² - 2 ) + x
x² - 2 + 3(x² - 2x + 1) = 4x² - 1 + x
x² - 2 + 3x² - 6x + 3 = 4x² + x - 1
x² + 3x² - 4x² - 6x - x = 2 - 3 - 1
- 7x = - 2
x = - 2/ - 7
x = 2/7