Question

Решите уравнение x^2+5x=14

Answer 1

x^2+5x=14

x^2+5x-14=0
D = b2 - 4ac
D = 52 - 4*1*(-14) = 81
x1=(-5+9)/(2*1)=2
x2=(-5-9)/(2*1)=-7

Answer 2

х²+5х-14=0
D = 25- 4×(-14)=25 + 56 = 81 = 9²
x1 = (-5 + 9)÷2= 2
x2 = (-5-9)÷2= -7