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Calculati .a) (x-1)²-(x+2)-(2x+2)² b )(√2-x)(-x)-(2-√2x)² c)


Răspuns :

a) x²-2x+1-x-2-(4x²+8x+4)=x²-2x+1-x-2-4x²-8x-4=
=-3x²-11x-5
b) -√2x+x²-(4-4√2x+2x²)=-√2x+x²-4+4√2x-2x²=
=-x²+3√2x-4