3 years ago

What number must you add to complete the square? x^2+6x=15

2 answers:

5 0

To complete the square you must split the b term in half, then square that answer.

6 is the b term, half of 6 is 3, 3 squared is 9. You will add 9 to both sides of x^2 + 6x = 15

x^2 + 6x + 9 = 24

puteri [66]3 years ago

3 0

I believe it would be 3±26

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