Объяснение:
а) (4а^2 •с+3)(4а^2 •с-3)-(-4^2 •с-5)^2=16а^4 •с^2 -9-256с^2 -160с+25=16а^4 •с^2 -256с^2 -160с+16
б) (2х^m -3y^n)-4x^(2m)=-4x^(2m) +2x^m -3y^n
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Объяснение:
а) (4а^2 •с+3)(4а^2 •с-3)-(-4^2 •с-5)^2=16а^4 •с^2 -9-256с^2 -160с+25=16а^4 •с^2 -256с^2 -160с+16
б) (2х^m -3y^n)-4x^(2m)=-4x^(2m) +2x^m -3y^n