Find the value of the expression 2x4–5x3+x2+3x+2 for x=5; –5.

answer:

for x=5     917

for x=-5     1637

step-by-step explanation:

2x4-5x3+x2+3x+2

x=5

2*5^4-5*5^3+5^2+3*5+2=

1250-375+25+15+2=

917

x=-5

2*(-5)^4-5*(-5)^3+(-5)^2+3*(-5)+2=

1250+375+25-15+2=

1637

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