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