Question

Tolong pake cara nya ya , tolong bantu soal nya besok dikumpulin

Answer 1

1a.

............3.............akar 2 + akar 19
-------------------------x-----------------------
akar 2 - akar 19....akar 2 + akar 19
...3( akar 2 + akar 19)
=--------------------------------
.........2 - 19
..3 akar 2 + 3 akar 19
=---------------------------
.........(- 17)

1b.

1 + akar 3...1 + akar 3
---------------x ------------
1 - akar 3 ...1 + akar 3

( 1 + akar 3)( 1 + akar 3)
=-----------------------------------
...........( 1 - 3)

...1 + akar 3 + akar 3 + 3
=-------------------------------------
.............( -2 )

...4 + 2 akar 3
=--------------------
.........(- 2)

= -2 - akar 3


2. { a^ ( 1/2 -(- 1) . b^ ( -1 - 2) }^ - 1 : { 3 a^ (3/2 - 1). b^ (2 - 1/2)}^2
   = { a^3/2 .b^ (-3)}^ - 1 : { 3a^1/2.b3/2}^2
   = { a^ - 3/2 . b^3} : { 3ab^3}
   = a^ ( -3/2 - 1) : (3)
   = a^ ( -5/2) : 3
   = 1 per ( 3 a^5/2)
   = 1 per ( 3 x (3)^5/2)
   = 1 per ( 3^( 1 + 5/2)
   = 1 per ( 3^7/2) atau 3^ - 7/2
   dibaca 1 per 3 pangkat 7/2 atau 3 pangkat minus 7/2