Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

Derivation

14-2*x^2 == 6

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

2*x^2 == 8

⇒ algebra.equations.coverup.times

x^2 == 4

⇒ algebra.equations.coverup.power

x == 2 or x == -2