Dik: A=x-2 B=-2x+1 C=3x+4 Pertanyaan: 1 a+b-c 2 a+2b 3 a×c

A = x - 2
B = -2x + 1
C = 3x + 4

Ditanya :

1. A + B - C
=(x-2) + (-2x + 1) - (3x + 4)
=x - 2 - 2x + 1 - 3x + 4
=-4x + 3

2. A + 2B
=(x - 2) + 2(-2x + 1)
=x - 2 - 4x + 2
=-3x

3. A x C
=(x - 2)(3x + 4)
=3x^2 + 4x - 6x - 8
=3x^2 - 2x - 8

Cara nomor 3 itu dikali pelangi