Question

b) (3p + 7)2 – 84p = (3p - 7)2 ​

Answer 1

Answer:

The value of $p=\frac{1}{3}$

Step-by-step explanation:

(b)

                   $(3p + 7)2 -84p = (3p -7)2\\ \\ 3p \cdot2 +7 \cdot 2 -84p=3p \cdot 2-7 \cdot 2\\ \\ 6p+14-84p=6p-14\\ \\ 6p-84p-6p=-14-14\\ \\ -84p=-28\\ \\ 84p=28\\ \\ p=\frac{28}{84} =\frac{1}{3}$