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Question
Use the product (a + b) (a – b) = a2 – b2 to evaluate:
4.6 x 5.4
Sum
Solution
4.6 x 5.4 = (5−0.4) (5+0.4)
= (5)2 − (0.4)2
= 25 − 0.16
= 24.84
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Product of Sum and Difference of Two Terms
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