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Mathematics 20 Online
OpenStudy (anonymous):

9x^2+30x+25

OpenStudy (anonymous):

\[9x^2 + 30x + 25\\\\ 9x^2 +15x + 15x +25 \\ 3x(3 x + 5 ) +5( 3 x + 5 ) \\ ( 3x + 5 ) ( 3x + 5) \\\]

OpenStudy (imtant):

You can also write it as (3x+5)^2.

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