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Mathematics 16 Online
OpenStudy (anonymous):

if f(x)=x^2-45,and f(2a)=-20,then what could be the value of a?

OpenStudy (anonymous):

What minus 45 is -20?

OpenStudy (anonymous):

Then take the square root of that number and divide it by 2.

OpenStudy (anonymous):

can you write the explaination please

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