Question

By what number (7)^-2 be multiplied to get 7^2. ​

Answer 1

Step-by-step explanation:

Let the unknown number be x then

${7}^{ - 2} \times x = {7}^{2} \\ = > \frac{1}{ {7}^{2} } \times x = {7}^{2} \\ = > x = {7}^{2} \times {7}^{2} \\ = > x = {7}^{4}$

so 7⁴ must be multiplied to (7)^-2 to get 7².