ada yang tau ga tolong di bantu ya

4. (3X-2)(3X+2) = 9X² + (6-6)X + (-2)(2) = 9X²-4

5. (4X-3)(4X+3) = 16X² + (12-12)X + (-3)(3) = 16X²-9

6. (5X-4)(5X+4) = 25X² + (20-20)X + (-4)(4) = 25X²-16

7. (3X-4Y)(3X+4Y) = 9X² + (12-12)XY + (-4)(4)Y² = 9X²-16Y²

8. (3X-5Y)(3X+5Y) = 9X² + (15-15)XY + (-5)(5)Y² = 9X²-25Y²

9. (6X-2Y)(6X+2Y) = 36X² + (12-12)XY + (-2)(2)Y² = 36X²-4Y²

10. (aX-b)(aX+b) = aX² + (ab-ab)X + (-b)(b) =
aX²-b²