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Luas Persegi = s^2
shg.
p × l = s^2
(3x-2)(x-2) = (x+2)(x+2)
3x^2 - 6x - 2x + 4 = x^2 + 4x + 4
2x^2 - 12x = 0
2x^2 = 12x
x^2 = 12x
x=12 atau x=0
(0 => TIDAK MUNGKIN)
shg. p = 3x-2 = 3(12)-2 = 34