1) ( 2X - 5 ) ² - ( 2X - 3)*( 2X + 3 ) = 0
4X² - 20X + 25 - ( 4X² - 9 ) = 0
4X² - 20X + 25 - 4X² + 9 = 0
20X = 34
X = 34 : 20
X = 1,7
2)15x-10=3x+3-2x-4
15x-3x+2x=3-4+10
14x=9
x=9/14
3) 2(4х*х+4х+1)-8(х*х-1)=34
8х*х+8*х+2-8х*х+8=34
8х=24
х=3
Объяснение:
1) ( 2X - 5 ) ² - ( 2X - 3)*( 2X + 3 ) = 0
4X² - 20X + 25 - ( 4X² - 9 ) = 0
4X² - 20X + 25 - 4X² + 9 = 0
20X = 34
X = 34 : 20
X = 1,7
2)15x-10=3x+3-2x-4
15x-3x+2x=3-4+10
14x=9
x=9/14
3) 2(4х*х+4х+1)-8(х*х-1)=34
8х*х+8*х+2-8х*х+8=34
8х=24
х=3
Объяснение: