РЕШИТЕ СРОЧНО (3x+5)(4x-6), (5x-9y)(5x+9y), (0,72x+0,2)(0,6x-0,7) ОЧЕНЬ СРОЧНО

1. (3x+5)(4x-6)

12x²-18x+20x-30

12x²+2x-30

2. (5x-9y)(5x+9y)

(5x)²-(9y)²

25x²-81y²

3. (0,72x+0,2)(0,6x-0,7)

0.432x²-0.504x+0.12x-0.14

0.432x²-0.384x-0.14