Fullstendig kvadrat
Fullstendig kvadrat
Fullstendig kvadrat
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Kvadratsetningene<br />
1. setning<br />
2. setning<br />
3. setning<br />
(a + b) 2 = (a + b) (a + b)<br />
= a 2 + ab + ab + b 2 = a 2 + 2ab + b 2<br />
(a - b) 2 = (a - b) (a - b)<br />
= a 2 - ab - ab + b 2 = a 2 - 2ab + b 2<br />
(a + b) (a - b)<br />
= a 2 - ab + ab + b 2 = a 2 - b 2
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