Factorize: x6- 7x3- 8
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x6 - 7x3 - 8
=> Let x3 = a
=> a²-7a-8
=> a²-(8-1)a-8
=> a² - 8a + a - 8
=> a (a-8) + 1 (a-8)
=> (a-8) (a+1)
=> Putting a=x³
=> (x³-8) (x³+1)
=> [ (x)³-(2)³ ] [ (x)³+(1)³ ]
=> (x-2)(x²+4+2x)(x+1)(x²+1-x) Ans
@:-)
x6 - 7x3 - 8
=> Let x3 = a
=> a²-7a-8
=> a²-(8-1)a-8
=> a² - 8a + a - 8
=> a (a-8) + 1 (a-8)
=> (a-8) (a+1)
=> Putting a=x³
=> (x³-8) (x³+1)
=> [ (x)³-(2)³ ] [ (x)³+(1)³ ]
=> (x-2)(x²+4+2x)(x+1)(x²+1-x) Ans
@:-)
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hope u have understood
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