Solve the following system of equations in real $a,\,b,\,c,\,d$:
$a+b=9$
$ab+c+d=29$
$ad+bc=39$
$cd=18$
Heuristic solution:
Showing posts with label form a quartic equation as the product of two quadratic equations. Show all posts
Showing posts with label form a quartic equation as the product of two quadratic equations. Show all posts
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