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What number must you add to complete the square?x + 28x = 11

What number must you add to complete the square?x + 28x = 11-example-1

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In a equation expressed by the form a*x^2 + b*x = c, we can complete square adding (b/2a)^2 on both sides.

For x^2 + 28x = 11, we have a = 1 and b =28

Therefore, we add (28/2*1)^2 = 14^2 = 196 on both sides.

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