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Factorisation by Regrouping Terms

4.52-1.52

Question

$(4.5)^{2} - (1.5)^{2}$

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Solution

$(4.5)^{2} - (1.5)^{2} = (4.5 + 1.5) (4.5 - 1.5) = 6 \times 3 = 18$

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