Erfana Beevee Binte Hassan Shariff's answer to Amanda's Secondary 4 E Maths Singapore question.
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Since the given equations are a^2 + b^2 and a + b and you are required to find ab, use the rule (a + b)^2.
(a + b)(a-b) = a^2 - b^2. This rule cannot be used as there is no ab in that rule.
Hope this helps :)
(a + b)(a-b) = a^2 - b^2. This rule cannot be used as there is no ab in that rule.
Hope this helps :)
Date Posted:
2 months ago
thank u so much
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