The given equation is 
This is of the form 
![\begin{array}{l} \therefore D=b^{2}-4 a c \\ =-[-(7 p+2)]^{2}-4 \times(2 p+1) \times(7 p-3) \\ =\left(49 p^{2}+28 p+4\right)-4\left(14 p^{2}+p-3\right) \\ =49 p^{2}+28 p+4-56 p^{2}-4 p+12 \\ =-7 p^{2}+24 p+16 \end{array}](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-d7690324ebfc46402337bff7a1a7bbb3_l3.png "Rendered by QuickLaTeX.com")
The given equation will have real and equal roots if 
Hence, 4 and 
Find the value of 
