Question

solve x^4-34x^2=-225

Answer 1

You can do a variable change: \[y = x^2\]

Answer 2

then, \[y^2 - 34y + 225 = 0\]

Answer 3

Can you do the rest by yourself?

Answer 4

quadratic equation?

Answer 5

yes!

Answer 6

so a=1 b=34 c=225

Answer 7

exactly!. Once you get the two values of y,you return to y = x^2 and solve for x

Answer 8

k thank you

Answer 9

i got a giant number :(( can you draw it out for me

Answer 10

well i got \[y_1 = 25, y_2 = 9\]

Answer 11

But, y = x^2, therefore, \[x_1 = 5, x_2 = -5, x_3 = 3, x_4 = -3\]

Answer 12

do you think you can draw it out?

Answer 13

Draw it?

Answer 14

I don't understand

Answer 15

That was rude, i understand draw. :-S