(3x+1)2-2(x-7)-10= x=1(x+2)2-(x-1)2-3x-3x2+2= x=3
Te 2 za nawiasami to potęgi ;p
9x*+2-2x-14-10= 9x*-23-2x
9-23-2=-16
x*+4-x*-1-3x-3x*+2=2x*+5-3x
18+5-27=-4
:D
1)9x^2+6x+1-2x+14-10=9x^2+4x+5
9*1^2+4*1+5=9+4+5=18
2) x^2+4x+4-(x^2-2x+1)-3x-3x^2+2=
=x^2+4x+4-x^2+2x-1-3x-3x^2+2=
=-3x^2+3x+5
-3*3^2 +3*3 +5=-3*9+9+5=-27+14=-13
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9x*+2-2x-14-10= 9x*-23-2x
9-23-2=-16
x*+4-x*-1-3x-3x*+2=2x*+5-3x
18+5-27=-4
:D
1)9x^2+6x+1-2x+14-10=9x^2+4x+5
9*1^2+4*1+5=9+4+5=18
2) x^2+4x+4-(x^2-2x+1)-3x-3x^2+2=
=x^2+4x+4-x^2+2x-1-3x-3x^2+2=
=-3x^2+3x+5
-3*3^2 +3*3 +5=-3*9+9+5=-27+14=-13