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OpenStudy (anonymous):
Factor Completely: 25x2 − 9 (5x + 3)(5x − 3) (5x − 3)(5x − 3) (5x + 1)(5x − 9) (5x − 1)(5x − 9)
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Parth (parthkohli):
\[25x^2 - 9\implies (5x)^2 - (3)^2 \]Difference of squares.
OpenStudy (anonymous):
okay.so the second one?
Parth (parthkohli):
No no.
Parth (parthkohli):
\[a^2 - b^2 = (a + b)(a - b)\]That's a hint.
OpenStudy (anonymous):
okay so I was right the first time. its the first one.
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Parth (parthkohli):
Yes.
OpenStudy (anonymous):
yessss thanks!
Parth (parthkohli):
Welcome ^_^
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