Упрости выражение:
1) 2m(m-3n)+m(5m+11n) ;
2) 8x(x^2+y^2)-9x(x^2-y^2) ;
3) 5b^3(2b-3)-2,5b^3(4b-6) ;
4) x(5x^2+6x+8)-4x(2+2x+x^2)
1) 2m(m-3n)+m(5m+11n) ;
2) 8x(x^2+y^2)-9x(x^2-y^2) ;
3) 5b^3(2b-3)-2,5b^3(4b-6) ;
4) x(5x^2+6x+8)-4x(2+2x+x^2)
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Answers & Comments
4) (5x^2+6x+8)+4x(2+2x+x^2)=x(5x^2+6x+8+8+8x+4x^2)=x(9x^2+14x+16)
2)8x^3+8xy^2-9x^3+9xy^2= 17xy^2-x^3
3)10b^4-15b^3-10b^4+15b^3=0
4)5x^3+6x^2+8x-8x-8x^2-4x^3=x^3-2x^2