tolong dijawan no 7-10 jawab yang benar besok dikumpulkan

7) -5p² + 4q² + 2r
= -5(1)² + 4(-2)³+ 2(12)
= - 5 - 32 + 24
= - 13

8) 6mn² = 2 . 3 . m . n²
9m² = 3² . m²
kpk = 2 . 3² . m² . n² = 18m²n²

9) 20a²b³c² = 2² . 5 . a² . b³ . c²
24a³b²c = 2³ . 3 . a³ . b² . c²
fpb = 2² . a² . b² . c² = 4a²b²c²

10)p = 2x + 4 = 2.9 + 4 = 22
l = x - 1 = 9 - 1 = 8

7. -5p² + 4q² +2r
= -5(1)² + 4(-2)² + 2(12)
= -5-32+24
= -13

10. p=2x +4=2.9+4=22
1 = x - 1 = 9 - 1 = 8