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Factorise: (l+m)2-(l-m)2

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Factorise: (l+m)2-(l-m)2
  • 1 answers

Sanvi Keshri 2 months, 3 weeks ago

= [(l+m)+(l-m)]×[(l+m)-(l-m)] = [I+m+l-m]x[I+m-l+m] = [2l]x[2m] =4lm
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