Someone ! this is due tomorrow and it is part of my grade me 35 points pleade solve and show 1, 3 and 5 are already done!

Step-by-step explanation:

((3 • (x4)) -  11x2) -  20  = 0

(3x4 -  11x2) -  20  = 0

Factoring  3x4-11x2-20  

The first term is,  3x4  its coefficient is  3 .

The middle term is,  -11x2  its coefficient is  -11 .

The last term, "the constant", is  -20  

Step-1 : Multiply the coefficient of the first term by the constant   3 • -20 = -60  

Step-2 : Find two factors of  -60  whose sum equals the coefficient of the middle term, which is   -11 .

     -60    +    1    =    -59  

     -30    +    2    =    -28  

     -20    +    3    =    -17  

     -15    +    4    =    -11    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -15  and  4  

                    3x4 - 15x2 + 4x2 - 20

Step-4 : Add up the first 2 terms, pulling out like factors :

                   3x2 • (x2-5)

             Add up the last 2 terms, pulling out common factors :

                   4 • (x2-5)

Step-5 : Add up the four terms of step 4 :

                   (3x2+4)  •  (x2-5)

            Which is the desired factorization

3x^4-11x^2-20=0

answer: sorry i can't you.

step-by-step explanation:

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720