8 - ? = -1. the missing number would be 9.
Answer:
Is and suppose to be plus
<span>Break down every term into prime factors. ...Look for factors that appear in every single term to determine the GCF. ...Factor the GCF out from every term in front of parentheses, and leave the remnants inside the parentheses. ...<span>Multiply out to simplify each term. </span></span>
Like what kinds? Finding out the type of angle? The degree?
