tolong guys nomer 6 dan 7

6) x^5 - 32
----------------
x - 2

= x^5 - 2^5
----------------
( x - 2 )

= (x - 2)^5
---------------
( x - 2 )

= (x - 2)⁴

7) f(x) = 5x³ - 4x² + 3x - 2
3f(4) = 3 {5(4)³ - 4(3)² + 3(4) - 2}
= 3 { (5 × 64) - (4 × 9) + 12 - 2}
= 3 (320 - 36 + 12 - 2)
= 3 × 294
= 882
2f(3) = 2 {5(3)³ - 4(3)² + 3(3) - 2}
= 2 { (5 × 27) - (4 × 9) + 9 - 2}
= 2 (135 - 36 + 9 - 2}
= 2 × 106
= 212
3f(4) - 2f(3) = 882 - 212 = 670