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Mathematics 13 Online
OpenStudy (anonymous):

d^2 + 18d + 81

OpenStudy (anonymous):

solve for d.

OpenStudy (anonymous):

This can be factored.

hartnn (hartnn):

which two numbers have product 81 and sum 18 ?

OpenStudy (anonymous):

What multiplies together to give +81, and adds to give 18.

hartnn (hartnn):

hint: they both are same numbers

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