Question

Yg bisa... tolong di jwb ya... jwb ny no 9-10 ajj...
pke cara ya

Answer 1

Saya lemah dalam pelajaran ini....:v

Answer 2

9.
a) (7-3+2).xy² = 6xy²

b) (2+3-1+4).ab² = 8ab²

c) (6+3-5).r²st = 4r²st

d) (7+5-4).xy²z^3 = 8xy²z^3

e) (3+6).xy + (-4-3).yz = 9xy-7yz

f) -2r² + (3+4)rs = -2r²+7rs


10.
a)
a²+4ab-3b²+ab-4b²+3a²+b²+4a²-23a = (1+3+4).a² - 23a + (-3-4+1).b² +
(4+1).ab
= 8a²-23a-6b²+5ab
jadi,hasil pengurangannya :
8a²-23a-6b²+5ab - (2a²+3b²+4c²)
= 8a²-23a-6b²+5ab-2a²-3b²-4c²
= (8-2).a² - 23a + (-6-3).b² + 5ab - 4c²
= 6a²-23a-9b²+5ab-4c²