Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

Derivation

0 == 3*x^2+8*x-3

⇒ algebra.equations.linear.flip

3*x^2+8*x-3 == 0

⇒ algebra.equations.quadratic.scale

x^2+8/3*x-1 == 0

⇒ algebra.equations.quadratic.prepare-split

x^2+8/3*x+16/9 == 25/9

⇒ algebra.equations.quadratic.left-square

(x+4/3)^2 == 25/9

⇒ algebra.equations.coverup.power

x+4/3 == 5/3 or x+4/3 == -5/3

⇒ algebra.equations.coverup.onevar.plus

x == 1/3 or x+4/3 == -5/3

⇒ algebra.equations.coverup.onevar.plus

x == 1/3 or x == -3