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Berechne durch die Perfekt- Quadrat-Trinomformel : $(a ,\pm b)^2 = a^2 ,\pm 2ab + b^2$ | 
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Got it ! Berechne und vereinfache:
| $x(x+2)^2 =$ | $x^3+4x^2+4x $ |
| $(x+1)^2(x+2) =$ | $x^3+4x^2+5x+2 $ |
| $(x+1)^2-(x-1)^2 =$ | $4x $ |
| $[1-(2-x)]^2-x(x-2) =$ | $1 $ |
| $[x+(2x+1)^2-(2x)^2]^2 =$ | $25x^2+10x+1 $ |
| $[(56ax+23)^0]^2 =$ | $ 1$ |