evaluate this 8.6^2-1.4^2 using suitable identities
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Answered by
36
Answer:
a² - b² = (a-b)(a+b)
8.6² - 1.4² = (8.6 - 1.4)(8.6 + 1.4)
= (7.2)(10) = 72
= 72
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Answered by
8
Answer:
72 mark
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Step-by-step explanation:
a² - b² = (a-b)(a+b)
8.6² - 1.4² = (8.6 - 1.4)(8.6 + 1.4)
= (7.2)(10) = 72
= 72
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