Solve z plus 1 times z minus 5?

Answer 1

The answer to (z + 1)(z - 5) is z2 -4z - 5. You can find this answer by using the FOIL method. Take the First (z and z) of each and multiply them together. This will give you z2. Multiply the Outer (z and -5) and Inner (z and +1), then add the two numbers together. This will give you -4z. Finally, multiply the Last(+1 and -5) of each factor. This will give the final answer of z2 - 4z - 5.