Answer
$x^2 -9x + 20 = 0$
Work Step by Step
the equation
$(x-4)(x-5) = 0$
has the answers 4,5
therefore lets multiply,
$x^2 -4x - 5x + 20 = 0$
$x^2 -9x + 20 = 0$
has the answers 4,5
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