Сократите дроби 1) 16a^2-9b^2/(20a-15b)^2 2) 4y^6-4y^4/y^7+2y^6+y^5

Question

Сократите дроби 1) 16a^2-9b^2/(20a-15b)^2 2) 4y^6-4y^4/y^7+2y^6+y^5

Answer 1

1) 16a^2-9b^2/(20a-15b)^2= (4a-3b)(4a+3b)/5(4a-3b)^2= 4a+3b/5(4a-3b)

2) 4y^6-4y^4/y^7+2y^6+y^5=4y^4(y-1)(y+1)/y^5(y+1)^2= 4y^4(y-1)/y^5(y+1)