What number must you add to complete the square x^2+2x=9
2 answers:
Answer:
+ 1
Step-by-step explanation:
Given
x² + 2x = 9
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(1)x + 1² = 9 + 1²
(x + 1)² = 10
Answer:x =(-2-√-32)/-2=1+2i√ 2 = 1.0000-2.8284i
x =(-2+√-32)/-2=1-2i√ 2 = 1.0000+2.8284
Step-by-step explanation:
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