Question

factorise x3-3x2-9x+5

Answer 1

Step-by-step explanation:

X(x^2-3x-9)+5

(X+5)(x^2-3x-9)

Now

Solving (x^2-3x-9) by shridhar acharya method

D = 9 - 4.1.-9

D= 9+36

D= 45

Now,

$x = 3 + - \sqrt{45 } \div 2$

X=3+root45/2 or 3-root45/2

Thus factors are = 5, 3+root45/2, 3-root45/2