Question

Bantu dong yang masih ol, dikumpulin besok :( pointnya gede lohh.. kalau bisa make cara yaa kaa

Answer 1

2.
b) 7/ 3x - 1/x = 7(1)/3x - 1(3)/3x = 7/3x - 3/3x = 4/3x

d) 5x/8y - x/4y = 5x(1)/8y - x(2)/8y = 5x/8y - 2x/8y = 3x/8y

f) 2s/6r+1 - s/8r-3 = 2s(8r-3)/(8r-3)(6r+1) - s(6r+1)/(8r-3)(6r+1)
=( 16sr-6s/48r²-10r-3 ) - (6sr+s/48r²-10r-3)
= 10sr-7s/48r²-10r-3

3.
a) 8/p × p/3 = (8×p)/(p×3) = 8p/3p = 8/3

c) 7xy/9 × 2y/x = (7xy×2y)/(9×x) = 14xy²/9x = 14y²/9 

e) 5y-8/3xy × 11/2x+1 = (5y-8 × 11)/(3xy × 2x+1) = 55y-88/6x²y+3xy

Answer 2

B.
7/3x - 1/×
= 7/3× - 3/3x
= 4/3x
d.
5x/8y - x/4y
= 5×/8y - 2×/8y
= 3x/8y
f.
2s/(6r+1) - s/(8r-3)
= 16sr-6s-6sr-s/(6r+1)(8r-3)
= 10sr-7s/(6r+1)(8r+3)
= 10sr-7s/48r^2+26r+3

a.
8/p × p/3
=8p/3p
= 8/3
c.
7xy/9 × 2y/x
= 14xy^2/9x
= 14y^2/9
e.
5y-8/3xy x 11/2×+1
= 55y-88 / 3x^2y+3xy

a.
9m/3 : m/3
= 27m/3m
= 9
c.
13x^3/y^2 : ×/y^3
= 13×^3y^3 / ×y^2
= 13x^2y
e.
5p+8/3pq : p^2q/pq^2
= 5p^2q^2+8pq^2 / 3p^3q^4
= pq^2(5p+8) / pq^2 (3p^2q^2)
= 5p+8 / 3p^2q^2
f.
-12/r^2+1 : r+1/r
=-12r / r^3+r^2+r+1
g.
3×+1/×-1 : 3x-1/×+1
= 3x^2+4×+1 / 3×^2-4×+1