Zapisz w jak najprostszej postaci:
a) 6a²-3c+2a²-5c-10a²+c
b) 2(5x-7y)-(3y-7x)
c) (5+2x)(3x-2)
d) 2x(4x-1)-(x-2)(x+2)
a) 6a²-3c+2a²-5c-10a²+c=-2a²-7c
b) 2(5x-7y)-(3y-7x)=10x -14y -3y +7x = 17x -17y
c) (5+2x)(3x-2)=15x-10+6x²-4x=6x²+11x-10
d) 2x(4x-1)-(x-2)(x+2)=8x²-2x-x²-2x+2x+4=7x²-2x+4
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a) 6a²-3c+2a²-5c-10a²+c=-2a²-7c
b) 2(5x-7y)-(3y-7x)=10x -14y -3y +7x = 17x -17y
c) (5+2x)(3x-2)=15x-10+6x²-4x=6x²+11x-10
d) 2x(4x-1)-(x-2)(x+2)=8x²-2x-x²-2x+2x+4=7x²-2x+4