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Descomponer -y^4+y^2-7 al cuadrado

Expresión a simplificar:

Solución

Ha introducido [src]
   4    2    
- y  + y  - 7
$$\left(- y^{4} + y^{2}\right) - 7$$
-y^4 + y^2 - 7
Simplificación general [src]
      2    4
-7 + y  - y 
$$- y^{4} + y^{2} - 7$$
-7 + y^2 - y^4
Factorización [src]
/             /    /    ___\\              /    /    ___\\\ /             /    /    ___\\              /    /    ___\\\ /               /    /    ___\\              /    /    ___\\\ /               /    /    ___\\              /    /    ___\\\
|    4 ___    |atan\3*\/ 3 /|     4 ___    |atan\3*\/ 3 /|| |    4 ___    |atan\3*\/ 3 /|     4 ___    |atan\3*\/ 3 /|| |      4 ___    |atan\3*\/ 3 /|     4 ___    |atan\3*\/ 3 /|| |      4 ___    |atan\3*\/ 3 /|     4 ___    |atan\3*\/ 3 /||
|x + \/ 7 *cos|-------------| + I*\/ 7 *sin|-------------||*|x + \/ 7 *cos|-------------| - I*\/ 7 *sin|-------------||*|x + - \/ 7 *cos|-------------| + I*\/ 7 *sin|-------------||*|x + - \/ 7 *cos|-------------| - I*\/ 7 *sin|-------------||
\             \      2      /              \      2      // \             \      2      /              \      2      // \               \      2      /              \      2      // \               \      2      /              \      2      //
$$\left(x + \left(\sqrt[4]{7} \cos{\left(\frac{\operatorname{atan}{\left(3 \sqrt{3} \right)}}{2} \right)} - \sqrt[4]{7} i \sin{\left(\frac{\operatorname{atan}{\left(3 \sqrt{3} \right)}}{2} \right)}\right)\right) \left(x + \left(\sqrt[4]{7} \cos{\left(\frac{\operatorname{atan}{\left(3 \sqrt{3} \right)}}{2} \right)} + \sqrt[4]{7} i \sin{\left(\frac{\operatorname{atan}{\left(3 \sqrt{3} \right)}}{2} \right)}\right)\right) \left(x + \left(- \sqrt[4]{7} \cos{\left(\frac{\operatorname{atan}{\left(3 \sqrt{3} \right)}}{2} \right)} + \sqrt[4]{7} i \sin{\left(\frac{\operatorname{atan}{\left(3 \sqrt{3} \right)}}{2} \right)}\right)\right) \left(x + \left(- \sqrt[4]{7} \cos{\left(\frac{\operatorname{atan}{\left(3 \sqrt{3} \right)}}{2} \right)} - \sqrt[4]{7} i \sin{\left(\frac{\operatorname{atan}{\left(3 \sqrt{3} \right)}}{2} \right)}\right)\right)$$
(((x + 7^(1/4)*cos(atan(3*sqrt(3))/2) + i*7^(1/4)*sin(atan(3*sqrt(3))/2))*(x + 7^(1/4)*cos(atan(3*sqrt(3))/2) - i*7^(1/4)*sin(atan(3*sqrt(3))/2)))*(x - 7^(1/4)*cos(atan(3*sqrt(3))/2) + i*7^(1/4)*sin(atan(3*sqrt(3))/2)))*(x - 7^(1/4)*cos(atan(3*sqrt(3))/2) - i*7^(1/4)*sin(atan(3*sqrt(3))/2))
Expresión del cuadrado perfecto
Expresemos el cuadrado perfecto del trinomio cuadrático
$$\left(- y^{4} + y^{2}\right) - 7$$
Para eso usemos la fórmula
$$a y^{4} + b y^{2} + c = a \left(m + y^{2}\right)^{2} + n$$
donde
$$m = \frac{b}{2 a}$$
$$n = \frac{4 a c - b^{2}}{4 a}$$
En nuestro caso
$$a = -1$$
$$b = 1$$
$$c = -7$$
Entonces
$$m = - \frac{1}{2}$$
$$n = - \frac{27}{4}$$
Pues,
$$- \left(y^{2} - \frac{1}{2}\right)^{2} - \frac{27}{4}$$
Compilar la expresión [src]
      2    4
-7 + y  - y 
$$- y^{4} + y^{2} - 7$$
-7 + y^2 - y^4
Parte trigonométrica [src]
      2    4
-7 + y  - y 
$$- y^{4} + y^{2} - 7$$
-7 + y^2 - y^4
Denominador racional [src]
      2    4
-7 + y  - y 
$$- y^{4} + y^{2} - 7$$
-7 + y^2 - y^4
Unión de expresiones racionales [src]
      2 /     2\
-7 + y *\1 - y /
$$y^{2} \left(1 - y^{2}\right) - 7$$
-7 + y^2*(1 - y^2)
Denominador común [src]
      2    4
-7 + y  - y 
$$- y^{4} + y^{2} - 7$$
-7 + y^2 - y^4
Combinatoria [src]
      2    4
-7 + y  - y 
$$- y^{4} + y^{2} - 7$$
-7 + y^2 - y^4
Respuesta numérica [src]
-7.0 + y^2 - y^4
-7.0 + y^2 - y^4
Potencias [src]
      2    4
-7 + y  - y 
$$- y^{4} + y^{2} - 7$$
-7 + y^2 - y^4