Question

Ajutați-ma , va rog frumos! Este foarte urgent! ​

Answer 1

Explicație:

a. 2i+j+i-j=3i

b. i-j+2i+j=3i

c. 3i+j+3i=6i+j

d. 3i+3i=6i

e. 2i+j+(i-j+2j)=2i+j+i+j=3i+2j

f. (2i+j-i+j)-(3i-2j)=i+2j-3i+2j=4j-2i

g. (2+1)i+(1-1)j=3i

h. (1-2)i+(1-1)j=i

i. b-c=i-j-3i=-2i-j

a×(b-c)=(2-2)i+(1-1)j=0

h. b×c=(1+3)i-j=4i-j

a×(b×c)=(2+4)i+(1-1)j=6i