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OpenStudy (anonymous):
Find the product. (9z + 11)^2 a. 81z^2 + 198z + 121 b. 9z^2 + 198z + 121 c. 81z^2 + 121 d. 9z^2 + 121
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OpenStudy (anonymous):
a
jimthompson5910 (jim_thompson5910):
(9z + 11)^2 (9z + 11)(9z + 11) 9z(9z + 11)+11(9z + 11) From here, distribute and simplify
OpenStudy (callisto):
(a + b)^2 = a^2 + 2ab + b^2 Put a =9z and b =11 What do you get?
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