Oblicz.Zadanie w załączniku.
Wyniki jakie mają wyjść:
a)6
b)-3+2 pierwiatek z 3
c)-12 pierwiastek z 3
d)10
e)12-2 pierwiastek z 30
f)49-20 pierwiatek z 2
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
3.
a)
(1+√2)²+(1-√2)² = 1+2√2+2+1-2√2+2 = 6
b)
(√3-1)²-(2-√3)² = 3-2√3+1-(4-4√3+3) = 4-2√3-(7-4√3) = 4-2√3-7+4√3 = -3+2√3
c)
(2√3 - 3/2)² - (2√3 +3/2)² = 12-6√3 + 9/4 -(12+6√3 + 9/4) = 12-6√3 +9/4 -12-6√3 -9/4 = -12√3
d)
(4-√5)(4+√5) - (√5-2)(2+√5) = 16-5-(√5-2)(√5+2) = 11-(5-4) = 11-1 = 10
e)
(√6-√5)(√6+√5)+(√6-√6)² = 6-5+6-2√30+5 = 12-2√30
f)
(2√5-√10)² - (2√5+1)(1-√5) = 20-4√50+10-(1+2√5)(1-2√5) = 20-20√2+10-(1-20) = 30-20√2-19 = 49-20√2
(a+b)² = a²+2ab+b²
(a-b)² = a²-2ab+b²
(a+b)(a-b) = a²-b²