Y^2-52y+576=0
D=2704-2304=400 D=20
x1=(52-20):2=16 x2=(52+20):2=36
110.88-6.3=104.58 Save me Save me
( 4х + 3 ) - ( 10х + 11 ) = 7 + ( 13 - 4х )
4х + 3 - 10х - 11 = 7 + 13 - 4х
4х - 10х + 4х = 13 + 7 + 11 - 3
-2х = 28
х = 28 : ( -2 )
х = -14.
Ответ : х = -14.
Удачи)))
b1=-7 bn+1=3bn bn+1/bn=3 q=3
s5=b1*(qⁿ-1)/(q-1)
s5=-7*(3⁵-1)/2=-7*242/2=-847