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A) 7a+8+(-3a)-3 = 7a+8-3a-3 = 7a-3a+8-3 = ~4a + 5
B) 2x+3y-4-5x+2y-7 = 2x-5x+3y+2y-4-7 = ~ -3x+5y-11
C) 4k+3kl-8k+6kl-2=4k-8k+3kl+6kl-2 = -4k+9kl-2
#2
A)12a-8b-5a+6b = 12a-5a-8b+6b =~ 7a-14b
B) 10x+15y+18x-15y=10x+18x+15y-15y = 28x+0 = 28x
C) 10k-6l-12k+8l =10k-12k-6l+8l = -2k-14l
#3
A) -12x pangkat2 - 20x
B) 6a pangkat2 - 4a + 24a-16 = 6a pangkat 2 + 20a - 16
C) 10k pangkat3 + 10k pangkat2 +5k-6k pangkat2-6k-1 = 10k pangkat 3 + 4k pangkat 2 + (-1k) - 1 = 10k pangkat 3 + 4k pangkat 2 - 1k -1
Maaf kalo ada yg salah