Question

Va rog am nevoie cat mai repede posibil ​

Answer 1

a=1/2+0,5×(4,25+3/4)

a=1/2+1/2×(425/100+3/4)

a=1/2+1/2×(17/4+3/4)

a=1/2+1/2×20/4

a=1/2+1/2×5

a=1/2+5/2

a=6/2

a=3

b=2 2/3-12/5:1 1/5

b=8/3-12/5:6/5

b=8/3-12/5×5/6

b=8/3-2

b=8/3-6/3

b=2/3

a²+b²=

=3²+(2/3)²=

=9+4/9=

=81/9+4/9=85/9