F( x ) = 9 x 3 + 2 x 2 ? 5 x + 4 and g ( x ) = 5 x 3 ? 7 x + 4 . what is f ( x ) ? g ( x ) ? show all of your steps and write your final answer in factored form.

The final answer is 2x(2x²+x+1)

Step-by-step explanation:

f(x)=9x³+2x²-5x+4 and g(x)= 5x³-7x+4.

We have to find f(x)-g(x).

To find f(x)-g(x) simply subtract g(x) from f(x)

(9x³+2x²-5x+4) - (5x³-7x+4)

Keep one thing in your mind that when when we subtract the expressions, signs of second bracket also gets multiplied by the negative sign which is outside the bracket.

Open the brackets for solution.

9x³+2x²-5x+4 - 5x³+7x-4

Now combine the like terms:

(9x³- 5x³)+2x²+(7x-5x) +(4-4)

4x³+2x²+2x

Now take out the common factor:

2x(2x²+x+1)

Thus the final answer is 2x(2x²+x+1)

the final answer is 2x(2x²+x+1) :)

i took the test and this is the final answer

- Iwasaki Katsuki

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺