1) 100x^2 - 1 = 0100x^2 = 1x^2 = 1/100x = ±√(1/100)x = ±1/10
2) 12x^2 + 7x = 0x(12x + 7) = 0x = 0 or 12x + 7 = 0x = 0 or 12x = -7x = 0 or x = -7/12
3) 25(1 - 2x)^2 = 0(1 - 2x)^2 = 01 - 2x = 0-2x = -1x = 1/2
1) 100x^2 - 1 = 0
100x^2 = 1
x^2 = 1/100
x = ±√(1/100)
x = ±1/10
2) 12x^2 + 7x = 0
x(12x + 7) = 0
x = 0 or 12x + 7 = 0
x = 0 or 12x = -7
x = 0 or x = -7/12
3) 25(1 - 2x)^2 = 0
(1 - 2x)^2 = 0
1 - 2x = 0
-2x = -1
x = 1/2