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2x² + 3x - 4x² +5x
= 2x² - 4x² + 3x + 5x
= -2x² + 8x
2. jumlahkan (soalnya 44 ya? saya asumsikan itu 4a ya)
4a + 3b - 5c
7a + 8b + 11c
----------------- +
11a + 11b + 6c
3. kurangkan
3x² - 5x + 5
5x² + 7x - 12
----------------- -
-2x² + 2x - 7
4. perkalian
= (5a - 11)(3a +8)
= (5a × 3a) + (5a × 8) + ( -11 × 3a) + (-11 × 8)
= 15a² + 40a + (-33a) + (-88)
= 15a² + 40a - 33a - 88
= 15a² + 7a - 88
8. (x + 3)³
= x³ + 27
yg lain kaga bisa hehe