1.15pq+10p² 2.x²-5x-24 3.64x-25

Bab Aljabar
Matematika SMP Kelas VIII

1] 15pq + 10p² = 5p . 3q + 5p . 2p
                        = 5p (3q + 2p)

2] x² - 5x - 24 = 0
    x² + 3x - 8x - 24 = 0
    x (x + 3) - 8 (x + 3) = 0
    (x - 8) (x + 3) = 0
    x - 8 = 0
    x = 8

   x + 3 = 0
   x = -3

   HP = { -3, 8 }

3] 64x - 25 = (8√x)² - 5²
                  = (8 √x + 5) (8√x - 5)