0.49=j*j

Solution for 0.49=j*j equation:

Simplifying
0.49 = j * j

Multiply j * j
0.49 = j2

Solving
0.49 = j2

Solving for variable 'j'.

Move all terms containing j to the left, all other terms to the right.

Add '-1j2' to each side of the equation.
0.49 + -1j2 = j2 + -1j2

Combine like terms: j2 + -1j2 = 0
0.49 + -1j2 = 0

Add '-0.49' to each side of the equation.
0.49 + -0.49 + -1j2 = 0 + -0.49

Combine like terms: 0.49 + -0.49 = 0.00
0.00 + -1j2 = 0 + -0.49
-1j2 = 0 + -0.49

Combine like terms: 0 + -0.49 = -0.49
-1j2 = -0.49

Divide each side by '-1'.
j2 = 0.49

Simplifying
j2 = 0.49

Take the square root of each side:
j = {-0.7, 0.7}