I need urgent help in math..again!?

Question

I need help in this promblem how do you solve it?
The sum of the number and its square is 72. find the number
you have to give irrational roots to the nearest tenth, i am soo confused!? Please help!! Show every step and all your work!!

i do not understand this !! I have to find the sum of anumber and its square is 30. find the nimber. i do not understand this please help show all your steps and work.

Give irrational roots to the nearest tenth! thanks a lot

i do not understand this !! I have to find the sum of anumber and its square is 30. find the nimber. i do not understand this please help show all your steps and work.

Give irrational roots to the nearest tenth! thanks a lot

do not listen to the top one i messed up o.k sry

Answer 1

X + X^2 = 72
X^2 + X - 72 = 0 factor
(X +9)(X -8) = 0
X = 8 or X = -9

X + X^2 = 30
X^2 + X - 30 = 0
(X + 6)(X - 5) = 0
X = -6 or X = 5

Answer 2

x^2 + x = 72
So x^2 + x -72 = 0
I don't feel like working out the math but that's how you set it up.
Use the quadratic equation too if it doesn't factor :]
x = [-b +/- ((radical) b^2 - 4ac) ] / 2a
ax^2 + bx - c = 0

Answer 3

umm ok, i jusst guessed and i found that x=8, well its
xsquared + x = 72
xsquared= 72 - x
x=+-<72-x>
IM NOT SURE ABOUT THE REST

<>= square root sign