obicz:
(2x-8y)²+(3x-8y)(3x+8y)-(3x+8y)²=
(x-1)(x+1)-(x²-1)(x+2)=
(6x-4y)(6x+4y)·5x=
prosze o rozwiązanie!
(2x-8y)²+(3x-8y)(3x+8y)-(3x+8y)²=4x²-32xy+64y²+9x²-64y²-(9x²+48xy+64y²)=
=13x²-32xy-9x²-48xy-64y²=4x²-80xy-64y²
(x-1)(x+1)-(x²-1)(x+2)=x²-1-(x³+2x²-x-2)=x²-1-x³-2x²+x+2=-x³-x²+x+1
(6x-4y)(6x+4y)*5x=(36x²-16y²)*5x=180x³-80y²x
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(2x-8y)²+(3x-8y)(3x+8y)-(3x+8y)²=4x²-32xy+64y²+9x²-64y²-(9x²+48xy+64y²)=
=13x²-32xy-9x²-48xy-64y²=4x²-80xy-64y²
(x-1)(x+1)-(x²-1)(x+2)=x²-1-(x³+2x²-x-2)=x²-1-x³-2x²+x+2=-x³-x²+x+1
(6x-4y)(6x+4y)*5x=(36x²-16y²)*5x=180x³-80y²x