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OpenStudy (anonymous):
ok so (2a+3b)(2a-3b)= 4a^2-9b^2
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OpenStudy (mathstudent55):
2a in the second parentheses will do it, but not 4a.
OpenStudy (anonymous):
so im right
OpenStudy (mathstudent55):
No. Now you have 4a in both parentheses. You need 2a in both parenteses.
OpenStudy (mertsj):
No you are not right. 4a times 4a is 16a^2
OpenStudy (anonymous):
SO IM RIGHT NOW
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OpenStudy (mathstudent55):
good
OpenStudy (mathstudent55):
good again
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