Substitution means putting numbers in place ... 8^2\) means \(-8 \times -8\), which is +64 using sign rules (two signs that are the same make a positive). \(2 + 64 = 66\). (The addition part ...

8^2\) means \(-8 \times -8\), which is +64 using sign rules (two signs that are ... This is the final answer. Substitution into formulae works the same way as substitution into expressions ...