Rewrite the equation as z2+1=-7.
Move all terms not containing z to the right side of the equation.
Subtract 1 from both sides of the equation.
Subtract 1 from -7.
Multiply both sides of the equation by 2.
Simplify both sides of the equation.
Cancel the common factor of 2.
Cancel the common factor.
Rewrite the expression.
Multiply 2 by -8.
Solve for z -7=z/2+1