Question

If X= 2+5i, then value of expression X³-5X2+33X-49 equals​

Answer 1

Answer:

Given,

(x−2)=5i

Now squaring both sides we get,

x

2

−4x+4=−25

or, x

2

−4x+29=0.....(1).

Now,

x

3

−5x

2

+33x−19

=x

3

−4x

2

+29x−x

2

+4x−19

=x(x

2

−4x+29)−(x

2

−4x)−19

=29−19 [ Using (1)]

=10.

Step-by-step explanation:

I HOPE ANSWER IS CORRECT

Answer 2

Answer:

-1190

Step-by-step explanation:

X=2+5=7

X^3-5X^3+33X-49

7^3-5*7^3+33*7-49

343-5*343+231-49

343-1715+231-49

574-1764

-1190

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