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Mathematics

Grade10

Easy

Question

Find the product.(x – 13)(x – 13)

$x^{2} - 169$
$x^{2} - 26 x + 169$
$x^{2} + 169$
$x^{2} + 26 x + 169$

The correct answer is: $x squared – 26 x plus 169$

Using the pattern $left parenthesis a plus b right parenthesis squared equals a squared plus 2 a b plus b squared comma$
$left parenthesis x – 13 right parenthesis left parenthesis x – 13 right parenthesis equals left parenthesis x – 13 right parenthesis squared equals left parenthesis x plus left parenthesis negative 13 right parenthesis right parenthesis squared equals x squared plus 2 asterisk times x asterisk times left parenthesis negative 13 right parenthesis plus left parenthesis negative 13 right parenthesis squared equals x squared – 26 x plus 169$

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