Question

$\color{Red}{Question ❓}$
$49 - \frac{28}{a} + \frac{4}{ {a}^{2} }$

Find the value by expressing the whole square
when a = -1
​

Answer 1

Step-by-step explanation:

49-28/-1 +4/-1^2

=49-28/-1 +4/1

=49-28+4

=25/-1

=-25