T(t+7)-4t-28=0 решить уравнение

Question

T(t+7)-4t-28=0 решить уравнение

Answer 1

t(t + 7) - 4t - 28 = 0
t² + 7t - 4t - 28 = 0
t² + 3t - 28 = 0
D = 9 + 112 = 121
t₁ = (-3 + 11)/2 = 4
t₂ = (-3 - 11)/2 = -7

Answer 2

T(t+7)–4t–28=0
t^2+7t–4t–28=0
t^2+3t–28=0
a=1
b=3
c=–28
D=3^2–4*1*(–28)=9+112=121
^D=11
x1=–3+11/2=8/2=4
x2=–3–11/2=–14/2=–7