Answer:
[tex]\huge\boxed{\bf\:10x^{2} - 7xy - 12y^{2}}[/tex]
Step-by-step explanation:
[tex]\tt\:(5x+4y)*(2x-3y)\\\\\sf\: Use \: the \: distributive \: property. \\\\\tt\: 5x (2x - 3y) + 4y(2x - 3y)\\\tt\:10x^{2} - 15xy + 8xy - 12y^{2}\\\\\sf\: Simplify \: it \: further.\\\\\boxed{\bf\:10x^{2} - 7xy - 12y^{2}}[/tex]
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