Question

If x = 3, find the value of :-
x3 + 1
x2 + 2x +1
​

Answer 1

Answer:

1) x)=3. 2)=1.

Step-by-step explanation:

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Answer 2

Answer:

Correct option is

3

Solution:-

x=2−31

Multiplying the numerator and denominator by the conjugate of the denominator, we have

x=2−31×2+32+3=22−322+3=4−32+3=2+3

⇒x2=(2+3)2=4+43+3=7+43

Now consider the given expression

x3−2x2−7x+5=x3−7x−2x2+5

⇒=x