Find product using suitable identity 3x-2y=7 and xy=3 then find the value of (3x+2y)(3x+2y).
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(3x+2y)^2 = (3x-2y)^2 + 12xy
(3x+2y)^2 = 7^2 +12 (3)
= 49+36
= 85
(3x+2y)^2 = 7^2 +12 (3)
= 49+36
= 85
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