Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Derivation
x^2 == 2*x
⇒ algebra.equations.quadratic.move-leftx^2-2*x == 0
⇒ algebra.equations.quadratic.common-factorx*(x-2) == 0
⇒ algebra.equations.quadratic.product-zerox == 0 or x == 2