Question

afla valoarea literelor a si b: a×b+8=89. b×b-12=52. a×a-19=30. a×b-12=60

Answer 1

axb=89-8⇒axb=81⇒a=b=9
bxb-12=52⇒bxb=64⇒a=b=8
axa-19=30⇒axa=49⇒a=7
axb-12=60⇒axb=72⇒a=8;b=9  sau a=9;b=8