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Question 4 ,6 and 7:

4. Is $2{x}^{2}+\frac{5{x}^{\frac{3}{2}}}{\sqrt{x}}$ a polynomial. Justify your answer.

6. If the area of equilateral triangle is $\frac{\sqrt{3}}{4}c{m}^{2}$, then find the length of its each side.

7. In the figure, Ad is the bisector of $\angle BA.\mathrm{Prove}\mathrm{that}ABBD$.

6 ) https://www.meritnation.com/ask-answer/question/cn-some1-hlp-me-wit-this-the-are-of-an-equilateral-trian/mensuration/3467022

7 ) https://www.meritnation.com/ask-answer/question/in-the-figure-ad-is-the-bisector-of-angle-bac-prove-tha/triangles/9514379

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