√(113²-112²) + √(89²-80²) =bez użycia kalkulatora!
113² - 112² = (113 - 112)*(113 + 112) = 1*225 = 225
czyli
√(113² - 112²) = √225 = 15
----------------------------------
89² - 80² = (89 - 80)*(89 + 80) = 9*169
zatem
√(89² - 80²) = √(9* 169) = √9 * √169 = 3 * 13 = 39
-----------------------------------------------------------
Odp.
√(113² - 112²) + √(89² - 80²) = 15 + 39 = 54
==================================================
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
113² - 112² = (113 - 112)*(113 + 112) = 1*225 = 225
czyli
√(113² - 112²) = √225 = 15
----------------------------------
89² - 80² = (89 - 80)*(89 + 80) = 9*169
zatem
√(89² - 80²) = √(9* 169) = √9 * √169 = 3 * 13 = 39
-----------------------------------------------------------
czyli
Odp.
√(113² - 112²) + √(89² - 80²) = 15 + 39 = 54
==================================================