Question

1. 10 × (2g - 10) =
2. (x + 5) × (5x - 1) =
3. (7 − 2x) × (2x − 7) =
tolong disertai penjelasannya ya :)

Answer 1

1. 20g-100
2. 5x²-x+25x-5 = 5x²+24x-5
3. 14x-49-4x²+14x = 24x-49-4x²

caranya di kalikan semua.

Answer 2

1. 10 x (2g-10) = (10 x 2g) - (10 x 10) = 20g - 100 2. (x+5) x (5x-1) = 5x2 - 1x + 25x - 5 = 5x2 + 24x -5 3. (7-2x) x (2x-7) = (-2x+7) x (2x-7) = -4x2 + 14x +14x - 49 = -4x2 + 28x - 49 x2 = x kuadrat . Semoga membantu:)