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mestny [16]
3 years ago
12

What are the solutions to the equation y2 – 1 = 15?

Mathematics
2 answers:
aivan3 [116]3 years ago
8 0

Answer:

The solution of y² - 1 = 15  is +4 and -4

Step-by-step explanation:

Given

y² - 1 = 15

Our solution goes thus;

Make y² the subject of formula

y² = 15 + 1

Add 15 to 1

y² = 16

Take square roots of both sides

√y² = √16

y =  √16

Note that the square root of 16 is either +4 or -4 because +4 * +4 = 16 and -4 * -4 = 16; So, we replace √16 with ±4 which means + or -4

y = ±4

y = +4 and -4

Hence, the solution of y² - 1 = 15  is +4 and -4

Usimov [2.4K]3 years ago
4 0

-4 and 4. Those are the answers.

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