Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

Derivation

49 == x^2

⇒ algebra.equations.coverup.power

7 == x or -7 == x

⇒ algebra.equations.linear.flip

x == 7 or -7 == x

⇒ algebra.equations.linear.flip

x == 7 or x == -7