а) 9x²-12x+4-12x-9x²+16+12x=0
-12x+20=0
-12x=-20
x=5/3
б)(5y-8)(5y+8)=0
5y-8=0, 5y=8, y=8/5
5y+8=0, 5y=-8, y=-8/5
а) (x-2)² - (3x - 4) * (4+3x) = 0
9x² - 12x + 4 - (3x -4) * (3x+4) = 0
9x² - 12x + 4 - (9x² - 16) = 0
9x - 12x + 4 - 9x² + 16 = 0
-12x + 20 = 0
-12x = -20
x =
б) 25y² - 64 = 0
-25y² = 64
y =
y₁ = ,
y₂ =
а) 9x²-12x+4-12x-9x²+16+12x=0
-12x+20=0
-12x=-20
x=5/3
б)(5y-8)(5y+8)=0
5y-8=0, 5y=8, y=8/5
5y+8=0, 5y=-8, y=-8/5
а) (x-2)² - (3x - 4) * (4+3x) = 0
9x² - 12x + 4 - (3x -4) * (3x+4) = 0
9x² - 12x + 4 - (9x² - 16) = 0
9x - 12x + 4 - 9x² + 16 = 0
-12x + 20 = 0
-12x = -20
x =
б) 25y² - 64 = 0
-25y² = 64
y =
y =
y₁ = ,
y₂ =