Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

Derivation

2 == x^2

⇒ algebra.equations.coverup.power

sqrt 2 == x or -sqrt 2 == x

⇒ algebra.equations.linear.flip

x == sqrt 2 or -sqrt 2 == x

⇒ algebra.equations.linear.flip

x == sqrt 2 or x == -sqrt 2