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Verified answer
1. a. 4x² + 3x - 2x² + 5x = 2x² + 8xb. 5a² - 5 + 2a + 4 - 3a² - a = 2a² + a - 1
2. (4(2a + 2)) - (2(3a + 1))
= (8a + 8) - (6a + 2)
= 8a - 6a + 8 - 2
= 2a + 6
b) 5a^2 - 3a^2 + 2a -a - 5 + 4 = 2a^2 + a - 1
2. 4(2a+2) - 2(3a+1) = 8a + 8 - 6a - 2
= 8a - 6a + 8 - 2
= 2a + 6