Use the quadratic formula to slove 9x^2-4=0

x = 2/3 or x = -2/3

Step-by-step explanation:

Solve for x:

9 x^2 - 4 = 0

x = (0 ± sqrt(0^2 - 4×9 (-4)))/(2×9) = ( ± sqrt(144))/18:

x = sqrt(144)/18 or x = (-sqrt(144))/18

sqrt(144) = sqrt(16×9) = sqrt(2^4×3^2) = 4×3 = 12:

x = 12/18 or x = (-12)/18

12/18 = 2/3:

x = 2/3 or x = (-12)/18

(-12)/18 = -2/3:

 x = 2/3 or x = -2/3

f

step-by-step explanation:

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