Question

Hasil penjabaran bentuk aljabar
1. (x+2)(x-3)
2. (2x-3)(x+4)
3. (4k + 1)^
4. (3m + 2n)(3m - 2n)
5. (3 - a)(5 + a)
6. (2 + a)(a^ - 2a + 1)

Answer 1

1. x^2 -3x +2x -6 = x^2 -x -6

2. 2x^2 + 8x - 3x -12 = 1x^2 + 5x - 12

3. (4k + 1)^2 = (4k + 1) (4k + 1) = 16k^2 +4k + 4k + 1 = 16k^2 + 8k + 1

4. 9m^2 - 6mn + 6mn - 4n = 9m^2 - 4n

5. 15 + 3a - 5a - a^2 = 15 - 2a - a^2

6. 2a^2 - 4a + 2 + a^3 - 2a^2 + a = -3a + 2 + a^3

Semoga bener semua xD

Answer 2

1. (x + 2)(x - 3)
=> x² - 3x + 2x - 6
=> x² - x - 6
2. (2x - 3)(x + 4)
=> 2x² + 8x - 3x - 12
=> 2x² + 5x - 12
3. (4k + 1)²
=> (4k + 1)(4k + 1)
=> 16k² + 4k + 4k + 1
=> 16k² + 8k + 1
4. (3m + 2n)(3m - 2n)
=> 9m² - 6mn + 6mn - 4n²
=> 9m² - 4n²
5. (3 - a)(5 + a)
=> 15 + 3a - 5a - a²
=> 15 - 2a - a²
6. (2 + a)(a² - 2a + 1)
=> 2a² - 4a + 2 + a³ - 2a² + a
=> 2a² -2a² - 4a + a + 2 + a³
=> -3a + 2 + a³