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Question
Multiply the binomials.
(2.5l − 0.5m) and (2.5l + 0.5m)
Solution
(2.5l − 0.5m) × (2.5l + 0.5m)
= 2.5l × (2.5l + 0.5m) − 0.5m (2.5l + 0.5m)
= 6.25l2 + 1.25lm − 1.25lm − 0.25m2
= 6.25l2 − 0.25m2
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