Factonise: (l +m)²-(1-m)²
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1
Answer:
4lm
Step-by-step explanation:
(l²+2lm+m²) -(l²-2lm+m²)
l²+2lm+m²-l²+2lm-m²
2lm+2lm
4lm
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2
Step-by-step explanation:
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