1) 7.23 + 8.34 = 15.57
2) 15.57 - 1.001 = 14.569
Ответ: 14.569
6z(z6-54z-5) = 36z² - 324z² - 30z = -288z² - 30z
Решение смотри на фотографии
X^2 = 3x - 2
x^2 - 3x + 2 = 0
D = 9 - 8 = 1
x1 = ( 3 + 1)/2 = 4/2 = 2
x2 = ( 3 - 1)/2 = 2/2 = 1
x1 = 2
y1 = 2^2 = 4
x2 = 1
y2 = 1^2 = 1
Ответ
(1; 1)
(2; 4)