[tex]una expresión \: equivalente \: a \: (-a-b)² \: es \: \: \: \: \: \: \: \: a^{2}+2ab+b^{2} [/tex]
[tex](-a-b) ^ { 2 } \\ \\ \left(-a\right)^{2}-2\left(-a\right)b+b^{2} \\ \\ a^{2}-2\left(-a\right)b+b^{2} \\ \\ a^{2}+2ab+b^{2} [/tex]
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[tex]una expresión \: equivalente \: a \: (-a-b)² \: es \: \: \: \: \: \: \: \: a^{2}+2ab+b^{2} [/tex]
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[tex](-a-b) ^ { 2 } \\ \\ \left(-a\right)^{2}-2\left(-a\right)b+b^{2} \\ \\ a^{2}-2\left(-a\right)b+b^{2} \\ \\ a^{2}+2ab+b^{2} [/tex]