Question

Zapisz w jak najprostszej postaci:
a)2x(x-5)-3(x²-2x)+(x-2)x=
b)a(a+b+c)-b(a_b+c)-c(a-b-c)=
c)x(x²+2x+1)-(-4x³+8x²-6):2=

Z gory dzieki :D

Answer 1

a)2x(x-5)-3(x²-2x)+(x-2)x= 2x2 -10x -3x2 +6x+ x2 -2x = -6x
b)a(a+b+c)-b(a_b+c)-c(a-b-c)= a2 + ab +ac -ab -b2 -bc -ac+bc +c2 = a2 -b2+c2
c)x(x²+2x+1)-(-4x³+8x²-6):2= x3 + 2x2 +x +2x3 -4x2 +3= 3x3 -2x2 +x +3