Question

х²-7х+8х-56=0 сссррроооччснноооо!!!!!!

Answer 1

X^2 - 7x + 8x - 56 = 0!
X^2 - x - 56 = 0
D = 1 + 224 = 225,; V D = 15
X1 = ( 1 + 15 ) : 2 = 8
X2 = ( 1 - 15 ) : 2 = - 7
Ответ 8 ; - 7