Question 39154
{{{(x+1)(x-3)=4}}}
{{{x^2-2x-3=4}}}
{{{x^2-2x-7=0}}}
*[invoke quadratic "x", 1, -2, -7]
x(x-2)= -6
{{{x^2 - 2x + 6 = 0}}}
*[invoke quadratic "x", 1, -2, 6]