Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Derivation
2*x^2-6*x-3 == x^2+8*x+12
⇒ algebra.equations.quadratic.move-leftx^2-14*x-15 == 0
⇒ algebra.equations.quadratic.nice-factors(x+1)*(x-15) == 0
⇒ algebra.equations.quadratic.product-zerox == -1 or x == 15