plz solve this i will mark you as brainlist it's my test please guys
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1)(2x²y²+3y²z²)(9z²x²-7x²y²)
=y²(2x²+3z²)x²(9z²-7y²)
=(xy)²(2x²+3z²)(9z²-7y²)
you can solve it now
2)(629×629-371×371)/258
=(629²-371²)/258
=(629+371)(629-371)/258
=1000×258/258
=1000
3)(65×65-2×65×55+55×55)/(65×65+2×65×55+55×55)
={65²-2(65)(55)+55²}/{65²+2(65)(55)+55²}
=(65-55)²/(65+55)²
=10²/120²
=1/144
4)225²-215²
=(225+215)(225-215)
=440×10=4400
5)100.4×99.6
=(100+.4)(100-.4)
=100²-.4²
=10000-.16
=9999.84
pls mark as brainliest
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