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Question
Using the formula for squaring a binomial, evaluate the following: (703)2
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Solution
Here, we will use the identity \[\left( a + b \right)^2 = a^2 + 2ab + b^2\]
\[\left( 703 \right)^2 \]
\[ = \left( 700 + 3 \right)^2 \]
\[ = \left( 700 \right)^2 + 2 \times 700 \times 3 + 3^2 \]
\[ = 490000 + 4200 + 9\]
\[ = 494209\]
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