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Simplifying
5j2 + -20 = 0
Reorder the terms:
-20 + 5j2 = 0
Solving
-20 + 5j2 = 0
Solving for variable 'j'.
Move all terms containing j to the left, all other terms to the right.
Add '20' to each side of the equation.
-20 + 20 + 5j2 = 0 + 20
Combine like terms: -20 + 20 = 0
0 + 5j2 = 0 + 20
5j2 = 0 + 20
Combine like terms: 0 + 20 = 20
5j2 = 20
Divide each side by '5'.
j2 = 4
Simplifying
j2 = 4
Take the square root of each side:
j = {-2, 2}
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