Question

AYUDA PLIIIIISSSSE LOS RUEGOOO

Answer 1

Respuesta:

Explicación paso a paso:

a )  

$P(x)+Q(x) = (3x^{3} -5x^{2} +x-1)+(2x^{4} +x^{3} -2x+4} )$

$P(x)+Q(x) = 2x^{4} +4x^{3} -5x^{2} -x+3$

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b )

$P(x)-R(x) = (3x^{3} -5x^{2} +x-1)-(2x^{3} +3x^{2} -7x)$

$P(x)-R(x)= 3x^{3} -5x^{2} +x-1-2x^{3} -3x^{2} +7x$

$P(x)-R(x) =x^{3} -8x^{2} +8x-1$

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c )

$P(x)-Q(x)+R(x) = (3x^{3} -5x^{2} +x-1 )-(2x^{4} +x^{3} -2x+4)+(2x^{3}+3x^{2} -7x)=$

$P(x)- Q(x)+R(x)=3x^{3} -5x^{2} +x-1-2x^{4} -x^{3} +2x-4+2x^{3} +3x^{2} -7x =$

$P(x)-Q(x)+R(x)=-2x^{4} +4x^{3} -2x^{2} -4x-5$

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d )

$P(x)+Q(x)+R(x)=(3x^{3} -5x^{2} +x-1)+(2x^{4} +x^{3} -2x+4)+(2x^{3} + 3x^{2} -7x)=$

$P(x)+Q(x)+R(x) = 2x^{4} +5x^{3} -2x^{2} -8x+3$