Question

sabendo que A=(1/3)-(3/4) e B=(-2/3)+(1/2);
A) A×A=
B) A×B=
C)B×B=
D)B:A=
E)A:B=
F)A:2=

me ajudem, pfvr​

Answer 1

Resposta:

a) A x A = + 25/144

b) A x B = + 5/72

c) B × B= + 1/36

d) B : A= + 2/5

e) A : B= +5/2

f) A : 2= -5/24

Explicação passo-a-passo:

A=(1/3)-(3/4) = (4x1-3x3)/12 = (4-9)/12 = -5/12

B=(-2/3)+(1/2) = (-2x2 + 3x1)/6 = (-4+3)/6 = -1/6

a) A x A = -5/12 x -5/12 = + 25/144

b) A x B = -5/12 x -1/6 = + 5/72

c) B × B= -1/6 x -1/6 = 1/36

d) B : A= -1/6 : -5/12 = -1/6 x -12/5 = +12/30 = +6/15 = +2/5

e) A : B= -5:12 : -1/6 = -5/12 x -6/1 = +30/12 = +15/6 = +5/2

f) A : 2= -5/12 : 2 = -5/12 x 1/2= -5/24