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Mathematics

Grade10

Easy

Question

Find the product. $left parenthesis 2 x minus 8 right parenthesis squared$

4x² + 64
4x² - 32x + 64
4x² + 32x - 64
4x² – 64

The correct answer is: 4x² - 32x + 64

Using the pattern $left parenthesis a plus b right parenthesis squared equals a squared plus 2 a b plus b squared$
$left parenthesis 2 x plus left parenthesis negative 8 right parenthesis right parenthesis squared equals 4 x squared plus 2 asterisk times 2 x asterisk times left parenthesis negative 8 right parenthesis plus 64 equals 4 x squared – 32 x plus 64$

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