Q5) Find the sum of:
(i) 3x + 8y + 7z, 6y + 4z- 2x and 3y – 4x + 6z
(ii) 3a + 5b + 2c, 2a + 3b-c and a + b + c.
(iii) 4x^2+8xy-2y^2\ and\ 8xy\ -\ 5y^2+x^2
(iv) 9x^2-6x+7,\ 5-4x\ and\ 6-3x^2
(v) 5x^2-2xy+3y^2\ and\ -2x^2+5xy+9y^2\ and\ 3x^2-xy-4y^2
(vi) a^2+b^2+2ab,\ 2b^2+c^2+2bc\ and\ 4c^2-a^2+2ac
(vii) 9ax – 6bx + 8, 4ax + 8bx – 7 and – 6ax – 46x – 3
(viii) abc + 2 ba + 3 ac, 4ca – 4ab + 2 bca and 2ab – 3abc – 6ac
(ix) 4a^2+5b^2-6ab,\ 3ab,\ 6a^2-2b^2\ and\ 4b^2-5ab
(x) x^2+x-2,\ 2x-3x^2+5\ and\ 2x^2-5x+7
(xi) 4x^3+2x^2-x+1,\ 2x^3-5x^2-3x+6,\ x^2+8\ and\ 5x^3-7x