X² + 8x + 16 + x + 4 - 12 = 0
x² + 9x + 8 = 0
D = 81 - 32 = 49
x₁ = (-9 - 7)/2 = -8
x₂ = (-9 + 7)/2 = -1
Ответ: -1 и -8
Вынесем за скобку:<br />6.32*(0.47+0.53) = 6.32*1 = 6.32
З=21
О=11
Ч=7
Тоесть : з-о=21-11=10
о+о=11+11=22
Ч+з=7+21=28
(-1 1/9)(1 3/5-1/4)+2/5=119/180
1) 1 1/9 * 1 3/5 + 1/4*1 1/9=88/45+11/36=
=3168/1620+495/1620=3663/1620= 2 423/1620
2) 423/1620+2/5=423/1620+648/1620=1071/1620=357/540=119/180