What number must you add to the expression below to complete the square? x^2-20x?

1 answer:

5 0

We have that
x²<span>-20x
</span><span>Group terms that contain the same variable
</span>(x²-20x)
Complete the square
(x²-20x+10²)------> (x-10)²

the answer is
the number must be 100

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