briannacharron briannacharron

22-08-2018
Mathematics

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

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

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Lazerpent Lazerpent

22-08-2018

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

so [tex]\frac{4}{2}^2 [/tex]

[tex]2^2 [/tex]

4

[tex] x^2 - 4x + 4=7 + 4 [/tex]

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