Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

Derivation

Final term is not finished

sqrt 8 == x-7 or x-7 == -sqrt 8

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

7+sqrt 8 == x or x-7 == -sqrt 8

⇒ algebra.equations.quadratic.simpler-sqrt

7+2*sqrt 2 == x or x-7 == -sqrt 8

⇒ algebra.equations.linear.flip

x == 7+2*sqrt 2 or x-7 == -sqrt 8