7(x do 2 -3x-2)-3(x do 2-6x+1) i za x wstawiamy -0.2
pilnie
7(x²-3x-2)-3(x²-6x+1)=
7x²-21x-14-3x²+18x-3=
4x²-3x-17
4*(-0,2)²-3*(-0,2)-17=
4*0,04+0,6-17=
0,16+0,6-17=
-16,24
7(x^2 -3x-2)-3(x^2-6x+1)=
7(0,2^2 +3*0,2-2)-3(0,2^2+6*0,2+1)=
=7*(0,04+0,6-2)- 3(0,04+1,2+1)=
= - 9,52 - 6,72 = -16,24
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7(x²-3x-2)-3(x²-6x+1)=
7x²-21x-14-3x²+18x-3=
4x²-3x-17
4*(-0,2)²-3*(-0,2)-17=
4*0,04+0,6-17=
0,16+0,6-17=
-16,24
7(x^2 -3x-2)-3(x^2-6x+1)=
7(0,2^2 +3*0,2-2)-3(0,2^2+6*0,2+1)=
=7*(0,04+0,6-2)- 3(0,04+1,2+1)=
= - 9,52 - 6,72 = -16,24