(2x+5)(x-6)+2(3x+2)(3x-2)=5(2x+1)2+11,
x^2 + 2x - 2x - 4 = 3x^2 - 24x + 48 - 2x^2 - 10x;
x^2 + 2x - 2x - 3x^2 + 24x + 2x^2 + 10x = 48 + 4;
(x^2 - 3x^2 + 2x^2) + (2x - 2x + 24x + 10x) = 52;
34x = 52;
x = 52 : 34;
x = 52/34;
x = 1 18/34;
x = 1 9/17.
ответ: х = 1 9/17.
Объяснение:
(2x + 5)(x - 6) + 2(3x + 2)(3x - 2) = 5(2x + 1)² + 11
2х² - 12х + 5х - 30 + 2(9х² - 4) = 5(4х² + 4х + 1) + 11
2х² - 7х - 30 + 18х² - 8 = 20х² + 20х + 5 + 11
20х² - 7х - 38 = 20х² + 20х + 16
20х² - 7х - 20х² - 20х = 16 + 38
-27х = 54
х = -54 : 27
х = -2
(2x+5)(x-6)+2(3x+2)(3x-2)=5(2x+1)2+11,
x^2 + 2x - 2x - 4 = 3x^2 - 24x + 48 - 2x^2 - 10x;
x^2 + 2x - 2x - 3x^2 + 24x + 2x^2 + 10x = 48 + 4;
(x^2 - 3x^2 + 2x^2) + (2x - 2x + 24x + 10x) = 52;
34x = 52;
x = 52 : 34;
x = 52/34;
x = 1 18/34;
x = 1 9/17.
ответ: х = 1 9/17.
Объяснение:
(2x + 5)(x - 6) + 2(3x + 2)(3x - 2) = 5(2x + 1)² + 11
2х² - 12х + 5х - 30 + 2(9х² - 4) = 5(4х² + 4х + 1) + 11
2х² - 7х - 30 + 18х² - 8 = 20х² + 20х + 5 + 11
20х² - 7х - 38 = 20х² + 20х + 16
20х² - 7х - 20х² - 20х = 16 + 38
-27х = 54
х = -54 : 27
х = -2