if x=5+2√-4 find the value of
x4+9x3+35x2-x+4
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Answer:
X=-5+2root-4
=x+5=4i
=(x+5)^2=16i^2=>x^2+10x+25=-16=>x^2+10x+41=0
Now,x^4+9x^3+35x^2-x+4
=x^2(x^2+10x+41)-x(x^2+10x+41)+4(x^2+10x+41)-160
=x^2(0)+x(0)+4(0)-160=-160
Thus,the value of the given polynomial for x=-5+2root-4 is - 160
Yo yo answer---given by sk
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