(6-x)(6+x)+(3x-4)^2=52
36 - x^2 + (3x-4)^2 = 52
36 - x^2 + 9x^2 - 24x + 16 = 52
8x^2 - 24x +52 = 52
8x^2 - 24x = 0
8x(x-3) = 0
x=0
x=3
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(6-x)(6+x)+(3x-4)^2=52
36 - x^2 + (3x-4)^2 = 52
36 - x^2 + 9x^2 - 24x + 16 = 52
8x^2 - 24x +52 = 52
8x^2 - 24x = 0
8x(x-3) = 0
x=0
x=3