Question

SOS!!! Помогите решить, плизззззззззззз:)

Answer 1

$\frac{(b-4)^{2}}{2(b+3)}* \frac{4(b+3)}{(b-4)(b+4)}= \frac{2(b-4)}{b+4} = \frac{2(2.4-4)}{2.4+4}= \frac{3.2}{6.4}=0.5$