1) sederhanakan

1.a. 4 x 2 + 3x – 2×2 + 5x
= 8 + 3x – 4 + 5x
= 8-4+3x+5x
= 4 + 8x
b. 5a2 -5 + 2a +4 -3a2 – a
= 5a2 – 3a2 – a – 5 + 4
= 10a – 6a – a – 5 + 4
= 3a – 1
2. 2(3a+1)-4(2a+2)
= 6a+2-8a-8
= 6a-8a+2-8
= -2a-6
maaf klu salah