Question

Oblicz wartości wyrażeń dla : a = 1/5 , b = 2 , c = 1 , d =1/3

a) 5b - b² = 5 ·2 -2² = 5 ·2-2² = 10 - 4 =

b) 5a -a² = 5 · 1/5 - ⅕² =

c) 5c - c² = 5 ·1 - 1²

d) 5d - d² = 5 ·⅓ -⅓ ²=

e) (a - ¹/₁₀) :3 =

f) (b- ¹/₁₀ ) : 2 =

g) (c- ²/₆ ) : 6 =

h) ( d - ²/₆ ) : 14 =

Answer 1

5b-b^2=5*2-2*2=10-4=6
5a-a^2=5*1/5-1/5*1/5=1-1/25=24/25
5c-c^2=5*1-1*1=5-1=4
5d-c^2=5*1/3-1*1=5/3-1=1 2/3-1=2/3
(a-1/10):3=(1/5-1/10):3=(2/10-1/10)*1/3=1/10*1/3=1/30
(b-1/10):2=(2-1/10):2=1 9/10*1/2=19/10*1/2=19/20(c-2/6):6=(1-2/6):6=4/6*1/6=4/36=1/9 
(d-2/6):14=(1/3-2/6):14 =0:14=0