Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

Derivation

121/4 == (x-1/2)^2

⇒ algebra.equations.coverup.power

11/2 == x-1/2 or -11/2 == x-1/2

⇒ algebra.equations.coverup.onevar.minus-left

6 == x or -11/2 == x-1/2

⇒ algebra.equations.coverup.onevar.minus-left

6 == x or -5 == x

⇒ algebra.equations.linear.flip

x == 6 or -5 == x

⇒ algebra.equations.linear.flip

x == 6 or x == -5