tlng d jwb y ntr aku jdiin jwbn terbaik jan ngasal

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)x + (-4)(4)
= 9x² - 16

8) ( 3x - 5y) ( 3x + 5y)
= 9x² + ( 15 - 15)xy + ( -5y)(5y)
= 9x² - 25y²

9) ( 6x - 2y)(6x + 2y)
= 36x² + (12-12)xy - (2y)(2y)
= 36x² - 4y²

10) (ax - b )(ax + b)
= a²x² + (b - b)ax + (-b)(b)
= a²x² - b²