Factorise :49m^2 +140mn+100n^2
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2
Answer:
49m²+140mn+100n²
49m²+70mn+70mn+100n²
7m(7m+10n)+10n(7m+10n)
(7m+10n)(7m+10n)
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0
600^4
49m^2+140=189mn
189+100n^2=289^4
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