Product of two numbers is 189. Sum is 30. Find the numbers.
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1. x+y=30, so y=30-x . . . 2. xy=189 . . . x*(30-x)=189 . . . -x^2 +30x -189=0 . . . or +x^2 -30x +189=0 . . . quadratik equashun giv roots=9 & 21
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