question_answer

    The equation to a pair of opposite sides of a parallelogram are \[30\sqrt{3}m\] and \[10\sqrt{3}m\], the  equation  to  its diagonals are :

A)  \[\left( \text{a},\text{b}+\text{c} \right),\left( \text{b},\text{c}+\text{a} \right),\left( \text{c},\text{a}+\text{b} \right)\]and \[abc\]

B)  \[~{{\text{a}}^{\text{2}}}+{{\text{b}}^{\text{2}}}+{{\text{c}}^{\text{2}}}\] and \[\text{ab}+\text{bc}+\text{ca}\]

C)  \[y=2x+c\] and \[x+2y=3,3x+4y=7,2x+3y=4\]

D)  \[4x+5y=6\] and y \[xy=0\]