Factorise : 64l^2 -144m^2
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Step-by-step explanation:
» 64L² - 144M² = (8L)² - (12M)²
» 64L² - 144M² = (8L+12M)(8L-12M)
» 64L² - 144M² = 16(2L+3M)(2L-3M).
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