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Neha Vilasi

Aug 19, 2013

#### If x +1 =3 , then find the value of x6+1.         x                                                 x6



Raj kishore patro

Jul 10, 2013

#### x3 +1/x3 = 110,then x+1/x =



Mohammed furqaan Hussain

Aug 23, 2013



Meghna deshnur

Aug 5, 2013

#### Sir, I have a doubt regarding this question, kindly tell me whether the answer for the question given below is correct? Q) x3 - 3x2 - 9x - 5 Ans) p(x) = x3 - 3x2 - 9x - 5 Factors of 5 = 1,5,-1,-5 p(1) = 13 - 3 x (1)2  - 9 x (1) - 5        = 1 -3 - 9 - 5         = 1 - 17 = - 16 ≠ 0 p(-1) = (-1)3 x 3 x (-1)2 - 9 x (-1) -5         = -1 - 3 + 9 - 5 = -9 + 9 = 0 p(-1) =0 ∴ (x+1) is a factor of p(x)     p(x) ÷ (x+1)     x3 - 3x2 - 9x - 5 ÷ x + 1     = x2 - 4x - 5 x2 - 4x - 5 x2 - 5x + 1x - 5  = x ( x - 5) + 1 ( x - 5) = ( x - 5) ( x + 1)



Yes, correct
But finally  x3 - 3x2 - 9x - 5 = ( x + 1)( x + 1)( x - 5)

Sunitha

Aug 19, 2013



Aug 27, 2013



Meghna deshnur

Jul 26, 2013

#### If x + y + z = 8 and xy + yz + zx = 20 find the value of x3 + y3 + z3 - 3xyz.



Given x + y + z = 8 and xy + yz + zx = 20
Consider, x + y + z = 8
Squaring on both sides, we get
(x + y + z)2 = 82
x2 + y2 + z2 +2(xy + yz +zx) = 64
...

Neha Vilasi

Aug 31, 2013



Aakash Prakash

Sep 13, 2013



Anshu

Oct 7, 2013



Neha Vilasi

Aug 19, 2013

#### If x +1 =3 , then find the value of x6+1.         x                                                 x6



Raj kishore patro

Jul 10, 2013

#### x3 +1/x3 = 110,then x+1/x =



Mohammed furqaan Hussain

Aug 23, 2013



Meghna deshnur

Aug 5, 2013

#### Sir, I have a doubt regarding this question, kindly tell me whether the answer for the question given below is correct? Q) x3 - 3x2 - 9x - 5 Ans) p(x) = x3 - 3x2 - 9x - 5 Factors of 5 = 1,5,-1,-5 p(1) = 13 - 3 x (1)2  - 9 x (1) - 5        = 1 -3 - 9 - 5         = 1 - 17 = - 16 ≠ 0 p(-1) = (-1)3 x 3 x (-1)2 - 9 x (-1) -5         = -1 - 3 + 9 - 5 = -9 + 9 = 0 p(-1) =0 ∴ (x+1) is a factor of p(x)     p(x) ÷ (x+1)     x3 - 3x2 - 9x - 5 ÷ x + 1     = x2 - 4x - 5 x2 - 4x - 5 x2 - 5x + 1x - 5  = x ( x - 5) + 1 ( x - 5) = ( x - 5) ( x + 1)



Yes, correct
But finally  x3 - 3x2 - 9x - 5 = ( x + 1)( x + 1)( x - 5)

Sunitha

Aug 19, 2013



Aug 27, 2013



Meghna deshnur

Jul 26, 2013

#### If x + y + z = 8 and xy + yz + zx = 20 find the value of x3 + y3 + z3 - 3xyz.



Given x + y + z = 8 and xy + yz + zx = 20
Consider, x + y + z = 8
Squaring on both sides, we get
(x + y + z)2 = 82
x2 + y2 + z2 +2(xy + yz +zx) = 64
...

Neha Vilasi

Aug 31, 2013



Aakash Prakash

Sep 13, 2013