(y/4)^2=49

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Solution for (y/4)^2=49 equation: 


y in (-oo:+oo)

(y/4)^2 = 49 // - 49

(y/4)^2-49 = 0

1/16*y^2 = 49 // : 1/16

y^2 = 784

y^2 = 784 // ^ 1/2

abs(y) = 28

y = 28 or y = -28

y in { 28, -28 }

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