Question

Find the sum of :

(i) 3a + 4b + 7c, -5a + 3b - 6c

and 4a - 2b - 4c

(ii) 2x² + xy - y², - x² + 2xy + 3y²

and 3x² - 10xy + 4y²

(iii) x² - x + 1, - 5x² + 2x - 2

and 3x² - 3x + 1

(iv) a² - ab + bc, 2ab + bc - 2a²

and -3bc + 3a² + ab

(v) 4x² + 7 - 3x, 4x - x² + 8

and -10 + 5x - 2x²

(vi) 3x + 4xy - y², xy - 4x + 2y²

and 3y² - xy + 6x

Answer 1

(i) (3a + 4b + 7c) + ( -5a + 3b - 6c) + (4a - 2b - 4c)