Question

alguem me ajudaaaaaa​

Answer 1

Resposta:

A-) 4/21

B-) 21/16

C-) 27/25

D-) (22/14) 2= 11/7

Answer 2

a)2x(-1/2)+3x2/3= -1+2=1

b)(-5)^(2)+2(-5)=25-10=15

c) (4+2)/(4-2)=6/2=3

d)(-10+

$\sqrt{ {( - 10)}^{2} - 4 \times 2 \times 12 }$

)/4= 10+

$\sqrt{4}$

/4= (10+2)/4=12/4=3