Plzz answer Q. No. 13 to 17

13.  Locate  3  on the number line. 
14.Factorise 343a2-729b3 using algebraic identities. 
15. Show that 2x+1 is a factor of polynomials 2x2-11x2-4x+1
16. Prove that "parallelograms of the same and between the same parallels we  equal in area".

17. In figure, Lines XY and MN intersect at O if  P O Y   =   90 °  and a:b-2:3, find C.


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