Wykonaj działania V=pierwiastek
a) (x-1)(x+1)
b) (2y+3z)(2y-3z)
c) (1+3ab)(1-3ab)
d) (xy-mn)(xy+mn)
e) (1-V2)(1+V2)
f) (V5-2)(V5+2)
g) (V7+V3)(V7-V3
h) (2V3-1)(2V3+1)
Proszę o jak najszybsze i poprawne rozwiązania
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a) (x-1)(x+1) = x² - 1
b) (2y+3z)(2y-3z) = (2y)² - (3z)² = 4y² - 9z²
c) (1+3ab)(1-3ab) = 1² - (3ab)² = 1 - 9a²b²
d) (xy-mn)(xy+mn) = (xy)² - (mn)² = x²y² - m²n²
e) (1-V2)(1+V2) = 1² - √2² = 1 - 2 = -1
f) (V5-2)(V5+2) = √5² - 2² = 5 - 4 = 1
g) (V7+V3)(V7-V3) = √7² - √3² = 7 - 3 = 4
h) (2V3-1)(2V3+1) = (2√3)² - 1² = 4*3 - 1 = 12 - 1 = 11