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Simplifying
2p2 + 4 = 20
Reorder the terms:
4 + 2p2 = 20
Solving
4 + 2p2 = 20
Solving for variable 'p'.
Move all terms containing p to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + 2p2 = 20 + -4
Combine like terms: 4 + -4 = 0
0 + 2p2 = 20 + -4
2p2 = 20 + -4
Combine like terms: 20 + -4 = 16
2p2 = 16
Divide each side by '2'.
p2 = 8
Simplifying
p2 = 8
Take the square root of each side:
p = {-2.828427125, 2.828427125}
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