= (3-2)x2 -6x + 4x +1
= x² – 2x + 1
(5). (7a + b) + (–9a + 8b)
= (7-9)a + (1+8)b
= -2a + 9b
(6). (–3x²– 4x) + (5x² – x)
= (-3+5)x2 -4x-x
= 2x2 - 5x
(7). (8x – 6y) – (2x + 4y)
= (8-6)x - (6+4)y
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= (3-2)x2 -6x + 4x +1
= x² – 2x + 1
(5). (7a + b) + (–9a + 8b)
= (7-9)a + (1+8)b
= -2a + 9b
(6). (–3x²– 4x) + (5x² – x)
= (-3+5)x2 -4x-x
= 2x2 - 5x
(7). (8x – 6y) – (2x + 4y)
= (8-6)x - (6+4)y
Editor: Kun Daniel Chandra
Sumber: Berbagai Sumber
