Решите уранение: 1) x^2 + 7x = 0 2) z^2 - 3z = 0 3) 8y^2 - 3y = 0 4)10t^2 + 2t =0

Question

Решите уранение:
1) x^2 + 7x = 0
2) z^2 - 3z = 0
3) 8y^2 - 3y = 0
4)10t^2 + 2t =0

Answer 1

1) x^2 +7x = 0
Выносим x за скобку.
х*(х+7) =0
х= 0 и
х+7=0
х=-7
2)z^2 + 3z =0
z*(z+3) =0
z=0
z=-3
3)8y^2 - 3y=0
y*(8y-3)=0
y=0
8у -3=0
у=3/8
4) 10t^2 +2t=0
2t*(5t+1)=0
2t=0
t=0
5t+1=0
5t= -1
t=-0,2

Comments

Спасибо!!!