Question

1.Zapisz wyrazenie w jak najprostszej postac:
a) -(6m+1)+(-6m+1)=
b) (12k*2-k+1) - (-12k*2-k-l)+(-12k*2+k-l)=
c) 12xy(3x+4y+5)-12xy(-3x+4y-5)=
d) 12(x*2-3x+2)-3(x*2+2x-3)+9(-2x*2-2x-2)=
Prosze o rozwiazanie. Daje naj

Answer 1

a) -(6m+1)+(-6m+1)= -6m-1+6m+1= 0 (wszystko da radę skrócić)
b) (12k*2-k+1) - (-12k*2-k-l)+(-12k*2+k-l)= 23k+1+25k+l-23k-l=25k+1
c) 12xy(3x+4y+5)-12xy(-3x+4y-5)= (36 x^2 y+48x y^2 +60xy) - (-36x^2y + 48xy^2 -60xy) = 36x^2y + 48xy^2 + 60xy + 36x^2y - 48xy^2 + 60xy = 72x^2y + 120xy
d) 12(x*2-3x+2)-3(x*2+2x-3)+9(-2x*2-2x-2)=12(-x+2)-3(4x-3)+9(-6x-2)=(-12x+24)-(12x-9)+(-54x-18)=-12x+24-12x+9-54x-18=-78x+15