Ответ:
[tex]a) 20x^{4} y^{2} *100x^{5} y^{7} =2000x^{4+5} y^{2+7} =2000x^{9}y^{9}[/tex]
[tex]b) 20x^{2} y^{4} *(-3x^{18}y) =-60x^{2+18}y^{4+1} =-60x^{20} y^{5}[/tex]
Объяснение:
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Ответ:
[tex]a) 20x^{4} y^{2} *100x^{5} y^{7} =2000x^{4+5} y^{2+7} =2000x^{9}y^{9}[/tex]
[tex]b) 20x^{2} y^{4} *(-3x^{18}y) =-60x^{2+18}y^{4+1} =-60x^{20} y^{5}[/tex]
Объяснение: