UPSKILL MATH PLUS
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Learn moreSimplify the following using the identity \((a + b)^2 = a^2 + 2ab + b^2\).
(i) \((2x + 5)^2 =\)
(ii) \(21^2 =\)
Answer variants:
\(4x^2 + 10x + 25\)
\(144\)
\(441\)
\(4x^2 + 20x + 25\)
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