Respuesta :
Squares are the results of multiplying a value by itself. The value of x in the given equation 2x² - 5 = 13 is -3 and 3.
What is square root?
Squares are the results of multiplying a value by itself. Whereas the square root of a number is a value that when multiplied by itself yields the original value. As a result, both are vice versa approaches. For example, the square of 2 is 4 and the square root of 4 is 2.
The value of x for the given equation 2x²-5=13, can be solved as shown below.
2x² - 5 = 13
Add 5 on both the sides of the equation,
2x² - 5 + 5 = 13 + 5
2x² = 18
Divide both the sides of the equation by 2,
2x² / 2 = 18 / 2
x² = 9
Taking the square root on both the sides of the equation,
√x² = √9
x = ±3
x = -3, 3
Hence, the value of x in the given equation 2x² - 5 = 13 is -3 and 3.
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