Ответ: [tex]-x^{2} +2x+15[/tex]
Решение:
[tex]-(x+3)(x-5)=-(x^{2} -5x+3x-15)=-(x^{2} -2x-15)=-x^{2} +2x+15[/tex]
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Answers & Comments
-(x•x-5x+3x-3•5)
-(x^2-5x+3x-15)
-(x^2-2x-15)
-x^2+2x+15
Ответ: [tex]-x^{2} +2x+15[/tex]
Решение:
[tex]-(x+3)(x-5)=-(x^{2} -5x+3x-15)=-(x^{2} -2x-15)=-x^{2} +2x+15[/tex]