2. 9 added to the product of two consecutive multi-
ples of 6 gives 729. What are the numbers?
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Answer:
24&30 or -30&-24
Step-by-step explanation:
let x be one of the multiples
and x+6 be the next multiple. (x+6 cause it's consecutive multiple)
then the equation is
x * (x+6) + 9 = 729
x²+6x -720=0
x=-b+-✓b²-4ac/ 2a
x= -6+-✓36-4*1*-720/2
x=-6+-✓2916
x=-6+-54
x=-30. or x=24
the numbers are 24 and 30 or -30 and -24
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