Question

b) x(2x + 17) = 17x
c) 3x(x – 6) = 12 – 18x

Answer 1

b) Ответ: 0

$x(2x + 17) = 17x \\ 2 {x}^{2} + 17x - 17x = 0 \\ 2 {x}^{2} = 0 \\ x = 0$

c) Ответ: ±2

$3x(x - 6) = 12 - 18x \\ 3{x}^{2} - 18x + 18x = 12 \\ 3 {x}^{2} = 12 \\ {x}^{2} = 4 \\ x = + - 2$

Answer 2

Объяснение:

в)

х (2х + 17) = 17х

2х² + 17х = 17х

2х² + 17х - 17х = 0

2х² = 0

х² = 0 : 2

х² = 0

х = 0

3х(х - 6) = 12 - 18х

3х² - 18х = 12 - 18х

3х² - 18х + 18х = 12

3х² = 12

х² = 12 : 3

х² = 4

х1 = -2

х2 = 2