(1/2a + 3/4b - 1/3c)^2

Answer 1

just do ...

(1/2a + 3/4b - 1/3c) (1/2a + 3/4b - 1/3c)

using the distributive property, your fist line should have 9 terms.

Answer 2

2a+3b-c+(a-b-c)-(2a-4b+3c)