Tolong dong kerjain soal aljabar ini.soalnya di kumpulin besok

5) itu disuruh ngurangin ya?

22a + 56b + 12c – ( 18a + 42b + c )

= (22-18)a + (56-42)b + (12-1)c

= 4a + 14b + 11c

6) (2x + 14y)(4x + 8y)

= 8x² + 16xy + 56xy + 112y²

= 8x² + 72xy + 112y²

= 8(x² + 9xy + 14y²)

7) 8x²(4x + 9y + 6)

= 32x³ + 72x²y + 48x²

8) (10m + 8n)(12n – 7 + 9)

= (10m + 8n)(12n + 2)

= 120mn + 20m + 96n² + 16n

= 20m(6n + 1) + 16n(6n + 1)

= (20m + 16n)(6n + 1)