Solve using the square root method. Round to the nearest tenth if necessary.
x^2 + 15 =0
A. {3.9}
B. {3.9, -3.9}
C. {7.5, -7.5}
D. no real solution

Question

Solve using the square root method. Round to the nearest tenth if necessary.
x^2 + 15 =0
	A.	{3.9}
	B.	{3.9, -3.9}
	C.	{7.5, -7.5}
	D.	no real solution

jim_thompson5910 · Answer

$$\Large x^2 + 15 = 0$$


$$\Large x^2 + 15-15 = 0-15$$


$$\Large x^2 = -15$$


$$\Large \sqrt{x^2} = \sqrt{-15}$$


$$\Large x = \sqrt{-15}$$


So there are no real solutions.

mertsj · Answer

Subtract 15 from both sides and then take the square root of both sides.