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fenix001 [56]
3 years ago
15

MEGA POINTS... CAN CHAT AFTERWARDS...

Mathematics
1 answer:
slega [8]3 years ago
8 0

Answer:

B

Step-by-step explanation:

Given

x² - 18x + --- = 4 + ----

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 9)x + 81 = 4 + 81

(x - 9)² = 85 ( take the square root of both sides )

x - 9 = ± \sqrt{85} ( add 9 to both sides )

x = 9 ± \sqrt{85}  ← exact solutions

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