(5m-8)(5m+2)= Tolong dibantu ya .

(5m-8)(5m+2)=25m²+10m-40m-16
                      =25m²-30m-16

Mapel : Matematika
Kelas : VIII SMP
Bab : Persamaan Kuadrat

Pembahasan :
(5m - 8)(5m + 2)
= (5m)(5m) + (5m)(2) + (-8)(5m) + (-8)(2)
= 25m² + 10m - 40m - 16
= 25m² - 30m - 16