Question

5- 2x to the power of two = -15
what is x​

Answer 1

there are two answers
x= the square root of 10.
x= the negative square root of 10

Answer 2

5 - 2x^2 = -15

=> - 2x^2 = -15 -5

=> - 2x^2 = -20

=> x^2 = -20/-2

=> x^2 = 10

=> x = √10

=> x = 3.1622..........