Jawaban:
A. 3
B. 593
C. 1
Penjelasan dengan langkah-langkah:
A. 2x² + 4x – 5 – 8x =
2(2)² + 4(2) – 5 – 8(2) =
4² + 8 – 5 – 16 =
16 + 8 – 5 – 16 = 3
B. 4x³ + 5x² – 6x + 7 =
4(2)³ + 5(2)² – 6(2) + 7 =
8³ + 10² – 12 + 7 =
512 + 100 – 12 + 7 = 593
C. 3x + 4 – x – 7 =
3(2) + 4 – 2 – 7 =
6 + 4 – 2 – 7 = 1
maaf kalau salah