Question

Виконайте множення:
( 3n² - 5m )( 5n² + m ) ​

Answer 1

$(3n^2-5m)(5n^2+m)\\3n^2(5n^2+m)-5m(5n^2+m)\\15n^4+3mn^2-5m(5n^2+m)\\15n^4+3mn-25mn^2-5m^2\\15n^4-22mn^2-5m^2$