please Solve my problem
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Factorise (81x2-126xy+49y2)-25z2
=([9x)^2-2×9x×5y+(7y)^2] - 25z^2
=(9x-7y)^2 - (5z)^2
=(9x-7y-5z) (9x-7y+5z)
Ih ope it will help u..
=([9x)^2-2×9x×5y+(7y)^2] - 25z^2
=(9x-7y)^2 - (5z)^2
=(9x-7y-5z) (9x-7y+5z)
Ih ope it will help u..
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