Question

даювсе балы срочноооооо​

Answer 1

$\displaystyle\bf\\(d-8)(d+3)-(d+6)(d-14)=d^{2} \underbrace{+3d-8d}_{-5d}-24-(d^{2} \underbrace{-14d+6d}_{-8d}-84)=\\\\=d^{2} -5d-24-d^{2} +8d+84=3d+60\\\\d=-0,12\\\\3d+60=3\cdot(-0,12)+60=-0,36+60=59,64\\\\Otvet:\boxed{59,64}$