`4u^2 - 1 = 0` Solve the equation.

rsarvar1a | Student

4u^2 - 1 = 0

4u^2 - 1 + 1 = 0 + 1

4u^2 = 1

4u^2 / 4 = 1 / 4

u^2 = 1/4

sqrt(u^2) = sqrt(1/4)

u = 1/2, -1/2

iamkaori | Student

4u^2 - 1 = 0

Bring the -1 over to get:

4u^2 = 1

Divide both side by 4 to get:

u^2 = 1/4

Square root both sides to get the u as itself:

u = `+- 1/2`

Thus, `u = 1/2, -1/2`

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