Question

Solve using the square root method. Round to the nearest tenth if necessary.
x2 + 15 =0
A. {3.9}
B. {3.9, -3.9}
C. {7.5, -7.5}
D. no real solution

Answer 1

no real solution

Answer 2

take 15 to the right, you get x^2 = -15
with real numbers, squareds are always positive,
that's why nenadmatematika said there's no REAL solution - there's only one using complex numbers.