Question

2x² - 3X - 5 = 0

пж поможить​

Answer 1

2x²-3x-5=0

a=2 b= -3 c= -5

D=b²-4ac=(-3)²-4×2×(-5)=9+40=49=7

x1= -b+D/2a= 3+7/2×2=10/4=2,5

x2= -b-D/2a= 3-7/2×2= -4/4= -1

ответ: x1=2,5 x2= -1