Question

8. Find the value of x if pqx = (3p+q)? - (3p - q)?.
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Answer 1

Answer:

pqa=(3p+q)

2

−(3p−q)

2

We know that, a

2

−b

2

=(a+b)(a−b)

By using this formula,

pqa=[(3p+q)+(3p—q)][(3p+q)−(3p−q)]

pqa=[(3p+q+3p—q)][(3p+q−3p+q)]

pqa=(6p)×(2q)

a=

pq

6p×2q

=

pq

(6×2)pq

a=12

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