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Feliz [49]
3 years ago
8

Kelly is solving x^2 - 4x = 7 by completing the square. What number will Kelly add to both sides of the equation?

Mathematics
1 answer:
aleksandrvk [35]3 years ago
5 0

To complete the square, you add \frac{b}{2}^2 to both sides

so \frac{4}{2}^2

2^2

4

x^2 - 4x + 4=7 + 4

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