Question

Tricky. If x^2+x=3, then x^4+x= ?

Answer 1

\[x^{2}+x=3, x ^{4}+x= ?\]

Answer 2

it is a system of equations right?

Solve for one and pluge it into the other

Answer 3

No, MCQs:

a) x^2+3
b) 4(3-x)
C) 3(x-1)
D) 6(2-x)

Answer 4

still solve for the first and plug in to the second eq

Answer 5

Can't solve for the first

Answer 6

I don't know how to solve

Answer 7

use the quadratic formula

Answer 8

this is an odd one

the options you are given wouldn't work. Maybe it is asking something different but idk what.

Answer 9

It is 6(2-x)

Answer 10

Try to see why.

Answer 11

\[
x^4 + x= x(x^3+1)= x(x+1) ( x^2 - x +1)=\\
(x^2 +x)( (x^2 +x) -x -x +1)= 3( 3 -2x + 1)=3( 4 -2 x)=6(2-x)

\]

Answer 12

Thank you so much Elia, however, I figured this out in the morning today lol.

Answer 13

Excellent