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[tex]2b^{2} - a^{2} - 4 \: para \: a \: = 2 \: y \: b = 5[/tex]
[tex]2b^{2} - a^{2} - 4 \: para \: a \: = 2 \: y \: b = 5[/tex]
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Explicación paso a paso:
[tex]2 {b}^{2} − {a}^{2} −4 \: para \: a=2 \: y \: b=5 \\ 2(5 {)}^{2} - {2}^{2} - 4 \\ 50 - 4 - 4 \\ = 42[/tex]