1 ) 2a + 3b dari 7a + 8b
2) 5m + 7n dari 9m+8n
3) 10m-8n dari 15m+20n
4)7x²+2x+5 dari 8x²+6x+10
5)2y²+6y+10 dari 10y²+3y+16
tolong pake caranya dikunpulin sekarang
Kurangkanlah
1) 7a + 8b – ( 2a + 3b )
= 7a + 8b – 2a – 3b
= 7a – 2a + 8a – 3b
= 5a + 5b
2) 9m + 8n – ( 5m + 7n )
= 9m + 8n – 5m – 7n
= 9m – 5m + 8n – 7n
= 4m + n
3) 15m + 20n – (10m – 8n )
= 15m + 20n – 10m + 8n
= 15m – 10m + 20n + 8n
= 5m + 28n
4) 8x² + 6x + 10 – (7x² + 2x + 5)
= 8x² + 6x + 10 – 7x² – 2x – 5
= 8x² – 7x² + 6x – 2x + 10 – 5
= x² + 4x + 5
5) 10y² + 3y + 16 – (2y² + 6y + 10)
= 10y² + 3y + 16 – 2y² – 6y – 10
= 10y² – 2y² + 3y – 6y + 16 – 10
= 8y² – 3y + 6
No
1. 7a+8b-(2a+3b)
= 7a+8b-2a-3b
= 7a-2a+8a-3b
= 5a+5b
2, 9m+8n-(5m+7n)
= 9m+8n-5m-7n
= 9m-5m+8m-7n
= 4m+1n
3. 15m+ 20n-(15m-8n)
= 15m+20n-10m+8n
= 15m-10m+20n+8n
= 5m+28n
….
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sorry ya otak saya lg ngeblank nih
Semoga membantu