Question

find the square of - (8ab-5pq) , (x/5+y/7) , (3xy-7)


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Answer 1

1.(8ab-5pq)2

by using formula of a-b ka whole square okka

(8ab)2+(5pq)2-2(8ab×5pq)

64a2b2+25p2q2-80abpq answer

2.(x/5+y/7)

using formula a+b ka whole sq. okka

(x/5)2+(y/7)2+2(x/5×x/7)

x2/25+y2/49+2xy/35 answer

3.(3xy-7)

by using same formula as 1st sum

(3xy)2+(7)2-2(3xy×7)

9x2y2+49-42xy answer

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