x = 3
Объяснение:
( x+2 )( x-7 ) = ( x+1 )( x-8 )
x^2 - 7x + 2x - 14 = x^2 - 8x + x - 8
x^2 - 7x + 2x - 14 - x^2 + 8x - x + 8 = 0
x^2 - x^2 - 7x + 2x + 8x - x - 14 + 8 = 0
сокращаем
2x - 6 = 0
2x = 6
x = 6 : 2
х² -7х + 2х - 14 = х² - 8х + х - 8
-5х + 8х - х = - 8 + 14
2х = 6
х = 6 : 2
х = 3
x = 3
Объяснение:
( x+2 )( x-7 ) = ( x+1 )( x-8 )
x^2 - 7x + 2x - 14 = x^2 - 8x + x - 8
x^2 - 7x + 2x - 14 - x^2 + 8x - x + 8 = 0
x^2 - x^2 - 7x + 2x + 8x - x - 14 + 8 = 0
сокращаем
2x - 6 = 0
2x = 6
x = 6 : 2
x = 3
Объяснение:
х² -7х + 2х - 14 = х² - 8х + х - 8
-5х + 8х - х = - 8 + 14
2х = 6
х = 6 : 2
х = 3