Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

Derivation

0 == x^2-6*x

⇒ algebra.equations.linear.flip

x^2-6*x == 0

⇒ algebra.equations.quadratic.common-factor

x*(x-6) == 0

⇒ algebra.equations.quadratic.product-zero

x == 0 or x == 6