Respuesta:
[tex]2a^2+ab-15b^2[/tex]
Explicación paso a paso:
[tex]\left(a+3b\right)\left(2a-5b\right)[/tex]
[tex]a\cdot \:2a+a\left(-5b\right)+3b\cdot \:2a+3b\left(-5b\right)[/tex]
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Respuesta:
[tex]2a^2+ab-15b^2[/tex]
Explicación paso a paso:
[tex]\left(a+3b\right)\left(2a-5b\right)[/tex]
[tex]a\cdot \:2a+a\left(-5b\right)+3b\cdot \:2a+3b\left(-5b\right)[/tex]
[tex]2a^2+ab-15b^2[/tex]