Sederhanakanlah.
(1) 2(3a – 4) + 3(a + 2)
Jawaban
= 6a – 8 + 3a + 6
= 6a + 3a – 8 + 6
= 9a -2
(2) 6(5x + 3) + 4(-7x – 4)
Jawaban
= 30x + 18 – 28x -16
= 30x – 28x + 18 – 16
= 2x + 2
(3) 7(x + 2) – 4(2x – 5)
Jawaban
= 7x + 14 – 8x + 20
= 7x – 8x + 14 + 20
= -x + 34
(4) -2(-3a + 1) – 5(a – 8)
Jawaban
= 6a – 2 – 5a + 40
= 6a – 5a – 2 + 40
= a + 38
