Answer:
1. 6x² + 11x + 22
2. -4a - 3b + 4
3. 3x³ - 9x² - 4x + 51
Step-by-step explanation:
1. (2x² + 3x + 10) + (4x² + 8x + 12)
= (2x² + 4x²) + (3x + 8x) + (10 + 12)
= 6x² + 11x + 22
2. (10a - 9b + 6) - (14a + 6b -2)
= (10a - 14a) - (-9b + 6b) - (6 - 2)
= -4a - 3b + 4
3. (5x³ - 3x² - 7x + 23) - (2x³ - 6x² + 3x + 28)
= (5x³ - 2x³) - (-3x² - 6x²) - (-7x + 3x) - (23 + 28)
= 3x³ - 9x² - 4x + 51
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Answers & Comments
Answer:
1. 6x² + 11x + 22
2. -4a - 3b + 4
3. 3x³ - 9x² - 4x + 51
Step-by-step explanation:
1. (2x² + 3x + 10) + (4x² + 8x + 12)
= (2x² + 4x²) + (3x + 8x) + (10 + 12)
= 6x² + 11x + 22
2. (10a - 9b + 6) - (14a + 6b -2)
= (10a - 14a) - (-9b + 6b) - (6 - 2)
= -4a - 3b + 4
3. (5x³ - 3x² - 7x + 23) - (2x³ - 6x² + 3x + 28)
= (5x³ - 2x³) - (-3x² - 6x²) - (-7x + 3x) - (23 + 28)
= 3x³ - 9x² - 4x + 51