How do you factor this equation 9x2 plus 4?

Answer 1

Two possibilities here. 9x - 30x +25 = -21x + 25 and done, but I don't think you mean that.

9x² - 30x + 25 is more likely.

This is easier than normal, since this follows the square pattern.

(ax-b)² = a²x²-2ab+b²

a² = 9 so a=3

b² = 25 so b=5 3*5*2 = 30, so it checks.

(3x-5)(3x-5) = 9x² -15x - 15x + 25 = 9x² -30x + 25 ■

Answer 2

First of all, [ 9x2 + 4 ] is not an equation.

Then, it can't be factored without using imaginary numbers.

If you want to do that, then the factored form is

(3x + 2i) (3x - 2i) .

' i ' is the square root of -1 .

Answer 3

That doesn't factor neatly. Applying the quadratic formula, we find two real solutions: (-9 plus or minus the square root of 73) divided by 2.

x = -0.2279981273412348

x = -8.772001872658766

Answer 4

Assuming that's 9x2, it factors to (3x - 5i)(3x + 5i)

where i is the square root of -1.

Answer 5

That becomes 25y - 25, which factors to 25(y - 1)

Answer 6

x2 + 9x - 22 = x2 + (11 - 2)x + (11 x -2)

= x2 + 11x -2x + (11 x -2)

= (x + 11)(x - 2)

Answer 7

x3 - 25x = x (x2 - 25) = x (x + 5) (x - 5)

Answer 8

x(x - 5)(x + 5)

Answer 9

x2 + x + 25 can not be factored.

Answer 10

x(x^2 + 2x + 9)