Question

ajutor dar va rog mult sa fie scurt+​

Answer 1

Răspuns:

aduci la acelasi numitor.amplifici cu 6 la prima cu 3 la a 2 a. vom avea: (42/18+15/18-1/8)-(16/18-9/18)=56/18-7/18=49/18

b)introducem sub radical,si vom avea

21/5+5/4-9/8)-(15/10-8/10)

(68/40+50/40-45/40)-7/10

(73/40)-7/10

73/40-28/40

45/40

Answer 2

Răspuns:

Explicație pas cu pas:

(7·6+3·5-1)/18-(8·2-9)/18=(42+15-1-72+9)/18=(66-73)/18=-7/18

(4+1-1+1/5+1/4-1/8)-(3·5-4·2)/10=[4+(8+10-5)/40]-7/10=4+13/8-7/10=

=4+1+5/8-7/10=5+(5·5-4·7)/40=5+(25-28)/40=5-3/40=4 si  37/40