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solve:-
(2x-7)(x-3)(x+3)(2x+5)=91
Dear sayan
(2x-6-1)(x-3)(x+3)(2x+6-1)=91
[2(x-3)2 - (x-3)][ 2(x+3)2 - (x+3)]=91
4(x-3)2(x+3)2 -2(x+3)2(x-3)-2(x-3)2(x+3) +(x-3)(x+3) = 91
4(x-3)2(x+3)2 -2(x+3)(x-3)2x +(x2-9) = 91
[x+2(x-3)(x+3)]2 =100
or 2x2 +x-18 =±10
+ sign
2x2 +x-28 =0
- sign
2x2 +x-8 =0
now solve these two equation and find solution
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