Need some help on these 3
1.) x-6-23x to the 2nd power
2.) Y to the 3rd power - 7y+8+3y to the 3rd power + 7y to the 2nd power -4
3.) 4(T to the 2nd power + 3t -2) - 3(4t -1)
Bumping is rude. Please don't do it.
If I understand you correctly, you need to simplify these and put them in standard form.
1)
$\displaystyle x - 6 - 23x^2$
Put the term with the highest degree on the left-most side and work your way to the right, with the higher degrees to the left:
$\displaystyle -23x^2 + x - 6$
2)
$\displaystyle y^3 - 7y + 8 + 3y^3 + 7y^2 - 4$
Combine like terms first:
$\displaystyle = (y^3 + 3y^3) - 7y + (8 - 4) + 7y^2$
$\displaystyle = 4y^3 - 7y + 4 + 7y^2$
Now order them:
$\displaystyle = 4y^3 + 7y^2 - 7y + 4$
3)
$\displaystyle 4(t^2 + 3t - 2) - 3(4t - 1)$
Multiply it out first:
$\displaystyle = 4t^2 + 12t - 8 - 12t + 3$
Combine like terms:
$\displaystyle = 4t^2 + (12t - 12t) + (-8 + 3)$
$\displaystyle = 4t^2 - 5$
-Dan