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= 3x² + 2x - 1 + x² - 5x + 6
= 4x² - 3x + 5
2. 2 (x + 2y - xy) + 5 (2x -3y + 5xy)
= 2x + 4y -2xy + 10x -15y + 25xy
= 12x -11y + 35xy
3. (-5a - 6 + ab) - (a + 2ab - 1)
= -5a - 6 + ab - a - 2ab + 1
= -6a -ab -5
4. (3x + 5) (2x -6)
= 6x² - 18x + 10x -30
= 6x² -8x - 30
5. (4a - 2b) (3a + 6b)
= 12a² + 24ab - 6ab -12b²
= 12a² + 18ab -12b²
(3x² + 2x - 1) + (x² - 5x + 6)
nyatakan bentuk al jabar diatas tanpa tanda kurung
= 3x² + 2x - 1 + x² - 5x + 6
= 4x² - 3x + 5
2. Jawab :
2 (x + 2y - xy) + 5 (2x -3y + 5xy)
kalikan bentuk al jabar diatas
= 2x + 4y -2xy + 10x -15y + 25xy
= 12x -11y + 35xy
3. Jawab :
(-5a - 6 + ab) - (a + 2ab - 1)
nyatakan bentuk al jabar diatas tanpa tanda kurung
= -5a - 6 + ab - a - 2ab + 1
= -6a -ab -5
4. Jawab :
(3x + 5) (2x -6)
kalikan bentuk al jabar diatas
= 6x² - 18x + 10x -30
= 6x² -8x - 30
5. Jawab :
(4a - 2b) (3a + 6b)
kalikan bentuk al jabar diatas
= 12a² + 24ab - 6ab -12b²
= 12a² + 18ab -12b²