Doprowadź wyrażenie do najprostszej postaci i oblicz jego wartość liczbową :
-(3-2x+4x²)+(1-3x-6x²) dla x= -3
-(3-2x+4x²)+(1-3x-6x²)=
-(3-2*3+4*3^2)+(1-3*-3-6*-3^2)=
-3-6-36+1+9+54= 19
-(3-2x+4x²)+(1-3x-6x²)= -(3-2*(-3)+4*(-3)*(-3))+(1-3*(-3)-6*(-3)*(-3))= -(3-(-6)+27)+(1-(-9)-54)= -36+(-44)= -80
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-(3-2x+4x²)+(1-3x-6x²)=
-(3-2*3+4*3^2)+(1-3*-3-6*-3^2)=
-3-6-36+1+9+54= 19
-(3-2x+4x²)+(1-3x-6x²)= -(3-2*(-3)+4*(-3)*(-3))+(1-3*(-3)-6*(-3)*(-3))= -(3-(-6)+27)+(1-(-9)-54)= -36+(-44)= -80