Valor númerico 2

En estos ejercicios tenemos que sustituir el valor de la variable y realizar las operaciones.

\(\bullet P\left( x\right) =3x^{2}-5x+3;\ \ x=2\)

\(P\left( 2\right) =3\cdot 2^{2}-5\cdot 2+3\)

\(P\left( 2\right) =12-10+3\)

\(\boxed{P\left( 2\right) = 5}\)

\(\bullet P\left( x,y\right) =2x^{3}y-5x;\ \ x=-1\ \ y=5\)

\(P\left( -1,5\right) =2\cdot 5\left( -1\right) ^{3}-5\left( -1\right) \)

\(P\left( -1,5\right) =-10+5\)

\(\boxed{P\left( -1,5\right) =-5}\)

\(\bullet P\left( x,y\right) =3xy^{3}-2x^{2}y^{2}-1;\ \ x=2\ \ y=-1\)

\(P\left(2,-1\right) =3-2\left( -1\right) ^{3}-2\cdot 2^{2}\left( -1\right) ^{2}-1\)

\(P\left(2,-1\right) =-6-8-1\)

\(\boxed{P\left(2,-1\right) =-15}\)

\(\bullet P\left( x\right) =\left( \dfrac {x^{2}+x-12} {x+4}\right) ;\ \ x=3\)

\(P\left( 3\right) =\dfrac {3^{2}+3-12} {3+4}=\dfrac {12-12} {7}\)

\(\boxed{P\left(3\right) =0}\)

\(\bullet P\left( a,b\right) =5ab-6+2b^{5};\ \ a=3\ \ b=-2\)

\(P\left( 3,-2\right) =5\cdot 3\left( -2\right) -6+2\left( -2\right) ^{5}\)

\(P\left( 3,-2\right) =-30-6-64\)

\(\boxed{P\left( 3,-2\right) =-100}\)