Question

1. (x+4)(x+15)
2. (2y-5)(2y+3)
3. (4x-3)(5x-2)
4. (10-3y)(7+3y)
5. (6x-9y)(6x-9y)

Answer 1

1. (x + 4)(x + 15)
=> x² + 15x + 4x + 60
=> x² + 19x + 60
2. (2y - 5)(2y + 3)
=> 4y² + 6y - 10y - 15
=> 4y² - 4y - 15
3. (4x - 3)(5x  - 2)
=> 20x² - 8x - 15x + 6
=> 20x² - 23x + 6
4. (10 - 3y)(7 + 3y)
=> 70 + 30y - 21y - 9y²
=> 70 + 9y - 9y²
5. (6x - 9y)(6x - 9y)
=> 36x² - 54xy - 54xy + 81y²
=> 36x² - 108xy + 81y²
=> 9(4x² - 12xy + 9y²)

Answer 2

1. x2 + 15x + 4x +60 2. 4y2 + 6y - 10y -15 3. 20x2 - 8- 15x +6 4. 70+30y-21y-9y2 5. 36x2-54xy-54xy+81y2 | fyi, angka yg dibelakang variabel itu pangkatnya yaa. Maap kalo salah.