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How to find two numbers whose sum is 21 and whose product is 90?
Wiki User
∙ 12y ago
Factor 90 and find a combination that would add up to 21. 3x3x5x2. Try 3x3 plus 5x2. Nope. Try 3x5 plus 3x2. 15 + 6 = 21. Got it!
Wiki User
∙ 12y ago
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