Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

Derivation

9 == (x+3)^2

⇒ algebra.equations.coverup.power

3 == x+3 or -3 == x+3

⇒ algebra.equations.coverup.onevar.plus

0 == x or -3 == x+3

⇒ algebra.equations.coverup.onevar.plus

0 == x or -6 == x

⇒ algebra.equations.linear.flip

x == 0 or -6 == x

⇒ algebra.equations.linear.flip

x == 0 or x == -6