juvie65
20.03.2020 •
Mathematics
Which are the solutions of the quadra
x2 = 7x + 4
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Ответ:
x1=(7-√65)/2
x2=(7+√65)/2
Step-by-step explanation:
x^2=7x+4
x^2-7x-4=0
D=(-7)^2-4*1*(-4)=49+16=65
x1=(-(-7)-√D)/(2*1)=(7-√65)/2
x2=(-(-7)+√D)/(2*1)=(7+√65)/2
Ответ: