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dezoksy [38]
2 years ago
15

If y²-x=7, find the positive value of when x=9.​

Mathematics
2 answers:
swat322 years ago
6 0

Answer:

4

Step-by-step explanation:

when x = 9:

⇒ y² - 9 = 7

⇒ y² = 7 + 9

⇒ y² = 16

⇒ y = √16

⇒ y = ±4

Therefore, the positive value of y = 4

mina [271]2 years ago
4 0

Answer:

y = + 4

Step-by-step explanation:

y² - x = 7 ← substitute x = 9 into the equation

y² - 9 = 7 ( add 9 to both sides )

y² = 16 ( take square root of both sides )

y = ± \sqrt{16} = ± 4

the positive value of y when x = 9 is + 4

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