Exercise algebra.equations.quadratic.approximate
Description
solve a quadratic equation with approximation
Derivation
14-2*x^2 == 6
⇒ algebra.equations.coverup.onevar.minus-right2*x^2 == 8
⇒ algebra.equations.coverup.timesx^2 == 4
⇒ algebra.equations.coverup.powerx == 2 or x == -2