Question

sqrt(x+4)=-7 Solve.

Answer 1

square root (x+4)=-7 Square both sides and you get:

x+4=49
x=45

Substitute into the square root and you get square root (45+4)=square root (49)

The square root (49) =+/-7
Since the equation = -7, then the correct form of writing the equation is:

-square root (49)

Therefore, the square root (49)=7 but with the minus sign in front of the square root you get -7