Why do you subtract exponents when dividing powers with the same base?

Division. If two powers have the same base then we can divide the powers. When we divide powers we subtract their exponents. A negative exponent is the sameas the reciprocal of the positive exponent

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,