Предмет: Алгебра, автор: Аноним

Помогите сократить дроби
1.) 12xy^7t^2
-----------------
30x^3y^2t^3
2.) a^2-25b^2
---------------
4ab+20b^2

Ответы

Автор ответа: Аноним
0
N 1
12xy^7t^2 / 30x^3y^2t^3 = 2y^5 / 5х^2t
N 2
( a^2 - 25b^2 ) / ( 4ab + 20b^2 ) = [ ( a - 5b)•( a + 5b ) ] / [ 4b•( a + 5b ) ] = ( a - 5b ) / 4b
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