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OpenStudy (anonymous):
factor completely 20a^2+100 af+125f^2
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OpenStudy (anonymous):
20(a^2+5af+6.25f^2)=0 20(a+2.5)^2=0 a=?
OpenStudy (saifoo.khan):
um.. that's way off.
OpenStudy (anonymous):
help me please =-/
OpenStudy (lgbasallote):
heh it works though
OpenStudy (lgbasallote):
the maths seem right
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OpenStudy (lgbasallote):
but yeah..it doesnt look pretty... try factoring out 5 instead
OpenStudy (saifoo.khan):
\[5(4a^2 + 20af+25f^2)\]Now use that formula.
OpenStudy (saifoo.khan):
\[5(2a+5f)(2a+5f)\]
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