Giải thích các bước giải:
a/. $(84^2-48^2):(110^2-22^2)$
= $[(84-48)(84+48)]:[(110-22)(110+22)]$
= $(36.132):(88.132)$
= `(36)/(88)`
= `9/(22)`
b/. $(7,6^3+5,6^3):13,2-7,6.5,6$
= $(7,6+5,6)[(7,6)^2-7,6.5,6+(5,6)^2]:13,2-7,6.5,6$
= $13,2[(7,6)^2-7,6.5,6+(5,6)^2]:13,2-7,6.5,6$
= $[(7,6)^2-2.7,6.5,6+(5,6)^2]$
= $(7,6-5,6)^2$
= $2^2$
= $4$
c/. $(8543^2-1547^2):6996$
= $[(8543-1547)(8545+1547)]:6996$
= $6996.10092:6996$
= $10092$
d/. $4,2^3+3.17,64.1,8+12,6.3,24+1,8^3$
= $(4,2)^3+3.(4,2)^2.1,8+3.4,2.(1,8)^2+1,8^3$
= $(4,2+1,8)^3$
= $6^3$
=$216$
