Question

plzz ans these equation fast only those u know .... 19 a one plzzz guys fast

Answer 1

4x3-x2-36x-9=0 

One solution was found :

                         x ≓ -0.253598630

Step by step solution :

Step  1  :

Equation at the end of step  1  :

((22x3 - x2) - 36x) - 9 = 0

Step  2  :

Checking for a perfect cube :

 2.1    4x3-x2-36x-9  is not a perfect cube 

Trying to factor by pulling out :

 2.2      Factoring:  4x3-x2-36x-9 

Thoughtfully split the expression at hand into groups, each group having two terms :

Group 1:  -x2-9 
Group 2:  4x3-36x 

Pull out from each group separately :

Group 1:   (x2+9) • (-1)
Group 2:   (x2-9) • (4x)

Bad news !! Factoring by pulling out fails : 

The groups have no common factor and can not be added up to form a multiplication.

Polynomial Roots Calculator :

 2.3    Find roots (zeroes) of :       F(x) = 4x3-x2-36x-9