please solve it one sum
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Step-by-step explanation:
(7+5x)(7+5x )- (2x-3)(2x-3)
=(7+5x)² - (2x-3)²
=7²+(5x)²+2×7×5x - [(2x)²+3²-2×2x×3]
=49+25x²+70x–(4x²+9-12x)
=49+25x²+70x-4x²-9+12x
=21x²+82x+40
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Hiiiii what is your real name l think you are read in dr.bhabha public school l also read in this school in class 8 please say if you are in this school.
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