1. Add the following: a) 2a, 7b, 8c, - 3a, - 5b, 2c b) 7ab, 8bc, 9ac, - 6ab, - 2bc, - 7ac c) 5a²b², 6bc, 9b²c, -4a²b², - 5bc - 7b²c d) 6abc², 5a²bc, 4ab²c, - 5abc², -5a²bc, -4ab²c e) 4xy, 5yx, 2x²y² - 4y²x²

Answers 1

Answer:

a) 2a, 7b, 8c, - 3a, - 5b, 2c

2a+7b+8c+(-3a) +(-5b) +(-2c)

2a + 7b + 8c - 3a - 5b - 2c

2a - 3a + 7b - 5b + 8c - 2c (making pairs of like terms)

-1a + 2b + 6c

b) 7ab, 8bc, 9ac, - 6ab, - 2bc, - 7ac

7ab + 8bc + 9ac + (-6ab) + (-2bc) + (-7ac)

7ab + 8bc + 9ac - 6ab - 2bc - 7ac

7ab - 6ab + 8bc - 2bc + 9ac - 7ac

ab + 6bc + 2ac

c) 5a²b², 6bc, 9b²c, -4a²b², - 5bc - 7b²c

5a²b² + 6bc + 9b²c + (-4a²b²) + (-5bc) + (-7b²c)

5a²b² + 6bc + 9b²c - 4a²b² - 5bc - 7b²c

5a²b² - 4a²b² + 6bc - 5bc + 9b²c - 7b²c

a²b² + bc + 2b²c

d) 6abc²,5a²bc, 4ab²c, - 5abc², -5a²bc, -4ab²c

6abc² + 5a²bc + 4ab²c + (-5abc²) + (-5a²bc) + (-4ab²c)

6abc² + 5a²bc + 4ab²c - 5abc² - 5a²bc - 4ab²c

6abc² - 5abc²

abc²

e) 4xy, 5yx, 2x²y² - 4y²x²

4xy + 5yx + 2x²y² + (-4y²x²)

4xy + 5yx + 2x²y² - 4y²x²

9xy - 2x²y² ( since 5xy and 5yx means same )

Thanks