Respuesta :

gmany

[tex]x^2+10x=x(x+10)\\--------------------\\\\x^2+10=x^2-(-10)=x^2-(i\sqrt{10})^2\\\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\=(x-i\sqrt{10})(x+i\sqrt{10})[/tex]

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