If x2 = 30, what is the value of x?

Mathematics

2 answers:

nataly862011 [7]2 years ago

6 0

Subtract 30, then factor the equation.

... x² = 30

... x² - 30 = 0

... (x -√30)(x +√30) = 0

By the zero product rule, the solutions are values of x that make a factor be zero.

... x - √30 = 0 . . . . the first factor is zero

... x = √30

... x + √30 = 0 . . . . the second factor is zero

... x = -√30

The solutions are . . .

... x = ±√30 . . . . . matches your 3rd choice

klasskru [66]2 years ago

4 0

Answer: C

Step-by-step explanation: hope it helps :)

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