Помогите решить это пожалуйста!!!!!!!!
1)х^2-64у^2=
2)-2x^3-28x^2-98x=
3)49m^2-n^2
--------------------- =
3mn^2-21m^2n
4)81x^2-16
------------------- =
16-72x+81x^2
1)х^2-64у^2=
2)-2x^3-28x^2-98x=
3)49m^2-n^2
--------------------- =
3mn^2-21m^2n
4)81x^2-16
------------------- =
16-72x+81x^2
Answers & Comments
Verified answer
1.x²-64y²=(x-8y)(x+8y)
2.
-2x³-28x²-98x=-2x(x²+14x+49)=-2x(x+7)²
3.
(49m²-n²)/(3mn²-21m²n)= [(7m-n)(7m+n)]/[3mn(n-m)]
4.
(81x²-16)/(16-72x+81x²) = [(9x-4)(9x+4)]/(4-9x)²