Question

Add the following expression.
(i) 2a + b + 7 ; 4a + 2b + 3
(ii) 3x + y $-$ 8; y + 4 $-$7x
(iii) 3x² + 5x $-$ 4 ; 8x $-$ 2x² + 11
(iv) $5\sqrt{x}-4\sqrt{y}+2;2\sqrt{x}+7\sqrt{y}-5$

Answer 1

(i)

2a + b + 7
4a + 2b + 3
---------------------
6a + 3b + 10


(ii)

3x + y $-$ 8
$-$ 7x + y + 4
---------------------
$-$4x + 2y $-$ 4


(iii)

3x² + 5x $-$ 4
$-$2x² + 8x + 11
---------------------
x² + 13x + 7


(iv)

$$\begin{gathered} 5\sqrt{x}-4\sqrt{y}+2 \\ \underline{\underline{2\sqrt{x}+7\sqrt{y}-5}} \\ 7\sqrt{x}+3\sqrt{y}-3 \end{gathered}$$