Explicación paso a paso:
{2×+5}{2×-9}
2x×2x-2x×9+5x2x-5×9
4x²-18x+10x-45
4x²-8x-45
Salu2!!!
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Explicación paso a paso:
{2×+5}{2×-9}
2x×2x-2x×9+5x2x-5×9
4x²-18x+10x-45
4x²-8x-45
Salu2!!!