No.

Jawaban:

4. 9x² + (6 – 6)x + (-1) (1) dan 9x² – 1

5. 16x² + (12 – 12)x + (-3) (3) dan 16x² – 9

6. 25x² + (20 – 20)x + (-4) (4) dan 9x² – 16

7. 9x² + (12 – 12)xy + (-4y) (4y) dan 9x² – 16y²

8. 9x² + (15 – 15)xy + (-5y) (5y) dan 9x² – 25y²

9. 36x² + (12 – 12)xy + (-2y) (2y) dan 9x² – 4y²

10. ax² + (ab – ab)x + (-b) (b) dan ax² – b²

Penjelasan dengan langkah-langkah:

4. (3x – 2) (3x + 2)

(3x – 2) * (3x + 2)

= (3x * 3x) + (3x * 2) + (-2 * 3x) + (-2 * 2)

= 9x² + 6x – 6x + (-2 * 2)

= 9x² + (6 – 6)x + (-1) (1)

9x² + (6 – 6)x + (-1) * (1)

= 9x² + 0x + (-1)

= 9x² – 1

5. (4x – 3) (4x + 3)

(4x – 3) * (4x + 3)

= (4x * 4x) + (4x * 3) + (-3 * 4x) + (-3 * 3)

= 16x² + 12x – 12x + (-3 * 3)

= 16x² + (12 – 12)x + (-3) (3)

16x² + (12 – 12)x + (-3) * (3)

= 16x² + 0x + (-9)

= 16x² – 9

6. (5x – 4) (5x + 4)

(5x – 4) * (5x + 4)

= (5x * 5x) + (5x * 4) + (-4 * 5x) + (-4 * 4)

= 25x² + 20x – 20x + (-4 * 4)

= 25x² + (20 – 20)x + (-4) (4)

25x² + (20 – 20)x + (-4) * (4)

= 25x² + 0x + (-16)

= 9x² – 16

7. (3x – 4y) (3x + 4y)

(3x – 4y) * (3x + 4y)

= (3x * 3x) + (3x * 4y) + (-4y * 3x) + (-4y * 4y)

= 9x² + 12xy – 12xy + (-4y * 4y)

= 9x² + (12 – 12)xy + (-4y) (4y)

9x² + (12 – 12)xy + (-4y) * (4y)

= 9x² + 0x + (-16y²)

= 9x² – 16y²

8. (3x – 5y) (3x + 5y)

(3x – 5y) * (3x + 5y)

= (3x * 3x) + (3x * 5y) + (-5y * 3x) + (-5y * 5y)

= 9x² + 15xy – 15xy + (-5y * 5y)

= 9x² + (15 – 15)xy + (-5y) (5y)

9x² + (15 – 15)xy + (-5y) * (5y)

= 9x² + 0x + (-25y²)

= 9x² – 25y²

9. (6x – 2y) (6x + 2y)

(6x – 2y) * (6x + 2y)

= (6x * 6x) + (6x * 2y) + (-2y * 6x) + (-2y * 2y)

= 36x² + 12xy – 12xy + (-2y * 2y)

= 36x² + (12 – 12)xy + (-2y) (2y)

36x² + (12 – 12)xy + (-2y) * (2y)

= 36x² + 0x + (-4y²)

= 9x² – 4y²

10. (ax – b) (ax + b)

(ax – b) * (ax + b)

= (ax * ax) + (ax * b) + (-b * ax) + (-b * b)

= ax² + abx – abx + (-b * b)

= ax² + (ab – ab)x + (-b) (b)

ax² + (ab – ab)x + (-b) * (b)

= ax² + 0x + (-b²)

= ax² – b²