Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Derivation
2*x^2 == x^2+12*x
⇒ algebra.equations.quadratic.move-leftx^2-12*x == 0
⇒ algebra.equations.quadratic.common-factorx*(x-12) == 0
⇒ algebra.equations.quadratic.product-zerox == 0 or x == 12