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indrayani bargaje Grade: 10
        factorize


8x^3+5x^3+1
6 years ago

Answers : (1)

Sudheesh Singanamalla
114 Points
										

8x^3+5x^3+1?


13 x^3 + 1


using a3 + b3  = (a + b)(a2 – ab + b2)


a=(13)1/3x , b=1


so


13x^3 + 1 = ((13)1/3x+1)((13)2/3 - (13)1/3x + 1)


 


Now find the roots


 roots are


x = - 1 / (13)1/3


x = (13)1/3+√(13)1/2- 52*(13)1/3


x = (13)1/3+√(13)1/2+ 52*(13)1/3


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6 years ago
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