Question

Find the expansion of (2x+3y+5)(2x+3y-5)

Answer 1

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Answer 2

formula=(a+b+c)(a+b+c)=a²+ab+ac+ab+b²+bc+ac+bc+c²

=a²+b²+c²+2ab+2bc+2ac

a=2x

b=3y

c=-5

just replace all the values

hope it helps...