Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Derivation
9 == (x+3)^2
⇒ algebra.equations.coverup.power3 == x+3 or -3 == x+3
⇒ algebra.equations.coverup.onevar.plus0 == x or -3 == x+3
⇒ algebra.equations.coverup.onevar.plus0 == x or -6 == x
⇒ algebra.equations.linear.flipx == 0 or -6 == x
⇒ algebra.equations.linear.flipx == 0 or x == -6