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2009-12-16T22:29:00+01:00
(x+½)²-(x-1)(x+1)=16
x²+x+1/4-(x²-1)=16
x²+x+1/4-x²+1=16
x+5/4=16
x+5/4=64/4 |-5/4
x=59/4 = 14 i 3/4
x=14,75
2009-12-16T22:33:15+01:00
X2 + 1/4+x-x2-1=16
1/4+x-1=16
-3/4x=16/ *4
-3x=64/:(-3)
x= 21,(3)
2009-12-16T22:39:02+01:00
(x+½)²-(x-1)(x+1)=16
x²+x+¹/₄-(x²-1)=16
x²+x+¹/₄-x²+1=16
x+⁵/₄=16
x+⁵/₄=⁶⁴/₄
x=⁵⁹/₄
x=14¾