Diego thinks that x = 3 is a solution to the equation x² = 16. Do you agree? Explain or show your reasoning.
Yes, he is correct.
No, he is incorrect. The answer should be 6.
No, he is incorrect. The answer should be 9.
None of the above

No, he is incorrect. The answer should be 9.

Step-by-step explanation: x² = x times x so  in this case x is 3.

3 times 3 = 9

Lol this is prob more helpful than the other answer

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15