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What number should be added to the expression x^2 + 4x to change it into a perfect square trinomial?
x^2 + 4x the number to be added is found by dividing the constant of x by 2 and squared the number so # to be added = ( 4/2)² = 4 the perfect square trinomial is x² + 4x + 4 = (x + 2 )² which is a perfect square trinomial I hope this help you
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