Odpowiedzi

2010-01-27T20:16:05+01:00
(4+√11)(4-√11)-(4√5-√3)²+(8-2√15)²=46-24√15

3(1+√7)² -2(√7-3)²+(4√2-√5)(4√2+√5)=19+18√7

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2010-01-27T20:32:32+01:00
A) = 4²+ √11² - ( 4√5 - 2* 4√5 *√3 + √3²) + ( 8² - 2* 8*2√15+ (2√15)²)= (16+11) - (80 - 8√15 + 3) + (64 -32√15+60)= 27- 83 +8√15+64- 32√15+60=68-24√15

b)3(1+2√7+7) - 2(7-6√7+9)+ (4√2)²- √5²= (3+6√7+21)-(14-12√7+18)+32-5= 3+6√7+21-14+12√7-18+32-5=19+18√7