Question

[40-Phạm Anh Quân - 7B]

cho các đa thức M=4x3-2x2y+xy+1 N=3x2y+2xy-5 P=4x3-5x2y+3xy+1 Tính M-N-P:P-N-M

Answer 1

[T҉R҉ùM҉C҉U҉ốI҉iⁱ︵²ᵏ⁶|╰‿╯☪áℳậ℘]

M-N-P=4x³-2x²y+xy+1-3x²y-2xy+5-4x³+5x²y-3xy-1

           =-4xy+5

p-n-m=4x³-5x²y+3x²y+1-3x²y-2xy+5-4x³+2x²y-xy-1

          =-6x²y+5