oblicz stosując wzory skróconego mnożenia:
a) 48 * 52
b) 45 ^2 - 15 ^2
c) 102 ^2
48*52=(50-2)(50+2)=50^2-2^2=2500-4=2496
45^2-15^2=(40+5)^2-(10+5)^2=1600+400+25-100-100-25=2000-200=1800
102^2=(100+2)^2=10000+400+4=10404
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
48*52=(50-2)(50+2)=50^2-2^2=2500-4=2496
45^2-15^2=(40+5)^2-(10+5)^2=1600+400+25-100-100-25=2000-200=1800
102^2=(100+2)^2=10000+400+4=10404