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Simplificación de expresiones/ Expresar el cuadrado perfecto/ -x^4+2*x^2-3

Descomponer -x^4+2*x^2-3 al cuadrado

Expresión a simplificar:

Solución

Ha introducido [src] 
   4      2    
- x  + 2*x  - 3
(−x4+2x2)−3\left(- x^{4} + 2 x^{2}\right) - 3 
-x^4 + 2*x^2 - 3
Expresión del cuadrado perfecto
Expresemos el cuadrado perfecto del trinomio cuadrático
(−x4+2x2)−3\left(- x^{4} + 2 x^{2}\right) - 3
Para eso usemos la fórmula
ax4+bx2+c=a(m+x2)2+na x^{4} + b x^{2} + c = a \left(m + x^{2}\right)^{2} + n
donde
m=b2am = \frac{b}{2 a}
n=4ac−b24an = \frac{4 a c - b^{2}}{4 a}
En nuestro caso
a=−1a = -1
b=2b = 2
c=−3c = -3
Entonces
m=−1m = -1
n=−2n = -2
Pues,
−(x2−1)2−2- \left(x^{2} - 1\right)^{2} - 2
Factorización [src] 
/             /    /  ___\\              /    /  ___\\\ /             /    /  ___\\              /    /  ___\\\ /               /    /  ___\\              /    /  ___\\\ /               /    /  ___\\              /    /  ___\\\
|    4 ___    |atan\\/ 2 /|     4 ___    |atan\\/ 2 /|| |    4 ___    |atan\\/ 2 /|     4 ___    |atan\\/ 2 /|| |      4 ___    |atan\\/ 2 /|     4 ___    |atan\\/ 2 /|| |      4 ___    |atan\\/ 2 /|     4 ___    |atan\\/ 2 /||
|x + \/ 3 *cos|-----------| + I*\/ 3 *sin|-----------||*|x + \/ 3 *cos|-----------| - I*\/ 3 *sin|-----------||*|x + - \/ 3 *cos|-----------| + I*\/ 3 *sin|-----------||*|x + - \/ 3 *cos|-----------| - I*\/ 3 *sin|-----------||
\             \     2     /              \     2     // \             \     2     /              \     2     // \               \     2     /              \     2     // \               \     2     /              \     2     //
(x+(34cos⁡(atan⁡(2)2)−34isin⁡(atan⁡(2)2)))(x+(34cos⁡(atan⁡(2)2)+34isin⁡(atan⁡(2)2)))(x+(−34cos⁡(atan⁡(2)2)+34isin⁡(atan⁡(2)2)))(x+(−34cos⁡(atan⁡(2)2)−34isin⁡(atan⁡(2)2)))\left(x + \left(\sqrt[4]{3} \cos{\left(\frac{\operatorname{atan}{\left(\sqrt{2} \right)}}{2} \right)} - \sqrt[4]{3} i \sin{\left(\frac{\operatorname{atan}{\left(\sqrt{2} \right)}}{2} \right)}\right)\right) \left(x + \left(\sqrt[4]{3} \cos{\left(\frac{\operatorname{atan}{\left(\sqrt{2} \right)}}{2} \right)} + \sqrt[4]{3} i \sin{\left(\frac{\operatorname{atan}{\left(\sqrt{2} \right)}}{2} \right)}\right)\right) \left(x + \left(- \sqrt[4]{3} \cos{\left(\frac{\operatorname{atan}{\left(\sqrt{2} \right)}}{2} \right)} + \sqrt[4]{3} i \sin{\left(\frac{\operatorname{atan}{\left(\sqrt{2} \right)}}{2} \right)}\right)\right) \left(x + \left(- \sqrt[4]{3} \cos{\left(\frac{\operatorname{atan}{\left(\sqrt{2} \right)}}{2} \right)} - \sqrt[4]{3} i \sin{\left(\frac{\operatorname{atan}{\left(\sqrt{2} \right)}}{2} \right)}\right)\right) 
(((x + 3^(1/4)*cos(atan(sqrt(2))/2) + i*3^(1/4)*sin(atan(sqrt(2))/2))*(x + 3^(1/4)*cos(atan(sqrt(2))/2) - i*3^(1/4)*sin(atan(sqrt(2))/2)))*(x - 3^(1/4)*cos(atan(sqrt(2))/2) + i*3^(1/4)*sin(atan(sqrt(2))/2)))*(x - 3^(1/4)*cos(atan(sqrt(2))/2) - i*3^(1/4)*sin(atan(sqrt(2))/2))
Simplificación general [src] 
      4      2
-3 - x  + 2*x
−x4+2x2−3- x^{4} + 2 x^{2} - 3 
-3 - x^4 + 2*x^2
Denominador común [src] 
      4      2
-3 - x  + 2*x
−x4+2x2−3- x^{4} + 2 x^{2} - 3 
-3 - x^4 + 2*x^2
Respuesta numérica [src] 
-3.0 - x^4 + 2.0*x^2
-3.0 - x^4 + 2.0*x^2
Potencias [src] 
      4      2
-3 - x  + 2*x
−x4+2x2−3- x^{4} + 2 x^{2} - 3 
-3 - x^4 + 2*x^2
Compilar la expresión [src] 
      4      2
-3 - x  + 2*x
−x4+2x2−3- x^{4} + 2 x^{2} - 3 
-3 - x^4 + 2*x^2
Denominador racional [src] 
      4      2
-3 - x  + 2*x
−x4+2x2−3- x^{4} + 2 x^{2} - 3 
-3 - x^4 + 2*x^2
Parte trigonométrica [src] 
      4      2
-3 - x  + 2*x
−x4+2x2−3- x^{4} + 2 x^{2} - 3 
-3 - x^4 + 2*x^2
Unión de expresiones racionales [src] 
      2 /     2\
-3 + x *\2 - x /
x2(2−x2)−3x^{2} \left(2 - x^{2}\right) - 3 
-3 + x^2*(2 - x^2)
Combinatoria [src] 
      4      2
-3 - x  + 2*x
−x4+2x2−3- x^{4} + 2 x^{2} - 3 
-3 - x^4 + 2*x^2
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