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Mathematics 7 Online
OpenStudy (anonymous):

ok so (2a+3b)(2a-3b)= 4a^2-9b^2

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

OpenStudy (mathstudent55):

good

OpenStudy (mathstudent55):

good again

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