(x² - 2 )² - (2x-3)² =(x² -2 -2x +3)(x² -2+2x -3) =(x² -2x+1)(x² +2x -5) =
(x-1)²(x² +2x -5) .
* * * A² - B² =(A - B)*(A + B) * * *
(x +5)² =(3 -x)²
x² +10x +25 =9 -6x +x²
x² +10x +6x -x² =9 -25
16x = -16
x= -1
Ответ:
Объяснение:
4x-6(2y+3) = 3y - 7x + 8
<em>4x</em> - 12y - <u>18</u> -3y + <em>7x</em> -<u> 8</u> = 0
11x - 15y - 24 = 0
15y = 11x - 24
y = (11x - 24)/15
4x - (2x-5)/3 = (y+2)/6 - (2x-3y)/4 | *12
48x - 8x + 20 = 2y+4 - 6x + 9y
46x + 16 = 11y
y = (46x + 16)/11
sqrt500-sqrt75=sqrt125*sqrt4-sqrt3*sqrt25=2sqrt125-5sqrt5=2(sqrt25*sqrt5)-5sqrt5=
Х²-37х+27 = 0
х1+х2 = -b
x1+x2 = 37
x1*x2 = c
x1*x2 = 27
(Это по теореме Виета)