14х во второй степени+25х-84=0

Question

14х во второй степени+25х-84=0

Answer 1

14x^2+25x-84=0 D=25^2-4*14*(-84)= 625+4704=5329=73^2 X1=(-25+73)/2*14=48/28=12/7 X2=(-25-73)/2*14=-98/28=- 49/14=-7/2