👤

Answer :

Step-by-step explanation:

[tex] = {4}^{ - 2} \times {7}^{ - 2} [/tex]

[tex] = {(4 \times 7)}^{ - 2} [/tex]

[tex] = {28}^{ - 2} [/tex]

[tex] = \frac{1}{ {28}^{2} } [/tex]