Складываем: x-4y-x+3y=5+2; -y=7; y=-7; x=5-28=-23; Ответ: (-23;-7)
2x^2 + 12x - 18 = 0
x^2 + 6x + 9 = 0
x1 = -3
x2 = -3
Х³*х⁶*х⁷=х³⁺⁶⁺⁷=х¹⁶
(-ах)²*(-ах)³*(-ах)⁶=(-ах)²⁺³⁺⁶=(-ах)¹¹
х⁸:х⁴:х²=х⁸⁻⁴⁻²=х²
(а-b)³³:(а-b)³⁰:(а-b)=(а-b)³³⁻³⁰⁻¹=(а-b)²
(0,2)³*(0,2²)³
------------------- =(0.2)³⁺²*³⁻⁸=(0.2)³⁺⁶⁻⁸=0.2¹=0,2
(0.2)⁸
х³*(х⁵)⁷:х¹¹
------------- =х³⁺⁵*⁷⁻¹¹⁻²³=х³⁺³⁵⁻³⁴=х⁴
х²³
5x^2 - 30 = 0
5( x^2 - 6 ) = 0
x^2 - 6 = 0
x^2 = 6
x1 = √ 6
x2 = - √ 6