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Mathematics
lock:

i need quick help

5 months ago
lock:

http://prntscr.com/l99kd6 where did they get the other 4 ?

5 months ago
lock:

@Shadow

5 months ago
Nnesha:

completing the square\[\large\rm (\color{reD}{a}\color{orange}{-}\color{blue}{b})^2 = \color{red}{a^2} \color{orange}{-}\color{black}{2}\color{red}{a}\color{blue}{b}\color{orange}{+}\color{blue}{b^2}\]

5 months ago
Nnesha:

so for your question b is 2 and it is negative so -2 times -2 or (-2)^2=4

5 months ago
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