document.write( "Question 938052: The sum of two numbers is 20 and their product is 15. find the sum of their cubes? \n" ); document.write( "

Algebra.Com's Answer #571397 by ewatrrr(24785) $\"\"$ $\"About$

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The sum of two numbers is 20: numbers x and 20-x
\n" ); document.write( "and their product is 15.
\n" ); document.write( "x(20-x) = 15
\n" ); document.write( "20x - x^2 = 15
\n" ); document.write( "x^2 - 20x + 15 = 0 Format ax^2+ bx + c
\n" ); document.write( " $\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"$
\n" ); document.write( "x = 10 ą √85
\n" ); document.write( "(10+√85)^3 + (10-√85)^3 Use Calculator \n" ); document.write( "

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