Question

Выполни умножение:(4c^4−7d^2)⋅(4c^4+7d^2)

Answer 1

(4c^4-7d^2)(4c^4+7d^2)=16c^8-49d^4

Answer 2

=[(4c^4)^2-(7d^2)^2]=16c^8-49d^4