Question

fan and medal

Solve 9x2 + 6 = 12x.

1 plus or minus i square root 10
the quantity of 2 plus or minus i square root 10 all over 3
the quantity of 2 plus or minus i square root 2 all over 3
1 plus or minus i square root 2

Answer 1

Put into this format: \(\large ax^2+bx+c=0\)

Then use the quadratic formula
\(\Huge\frac{-b\pm\sqrt{b^2-4ac}}{2a}\)

Answer 2

i dont understand that formula at all, SORRY

Answer 3

You have \(\large 9x^2 +6=12x\) right?

Answer 4

right

Answer 5

Okay, so rearrange to fit the standard form \(\large ax^2+bx+c=0\)
--> \(\large 9x^2 -12x + 6=0\)

With me so far?

Answer 6

yes im along

Answer 7

Okay, so notice the form of \(\large ax^2+bx+c=0\) and \(\large 9x^2-12x+6=0\) match. Therefore, you can see that a = 9, b = -12, and c= 6

Understand?

Answer 8

yes i just dont understand the second equation you gave me

Answer 9

Okay, see those variables and values I gave you. Just plug those into the formula, and simplify. That will get you the value of x

Answer 10

\(\Huge\frac{-(-12)\pm\sqrt{(-12)^2-4(9)(6)}}{2(9)}\)

Answer 11

so the b^2 will be -12

Answer 12

ah okay

Answer 13

Let me know if you need any other help

Answer 14

thank you soso very much

Answer 15

You're welcome :)