Question

Giải phương trình sau : -3x²+12=0

Answer 1

-3x^2 + 12 = 0`

`=> -3x^2 = 0-12`

`=> -3x^2 = -12`

`=>   x^2  = -12 : -3`

`=>  x^2   = 4`

`=> x       = 2` hoặc `x = -2`

Vậy `x = 2; x = -2`

Answer 2

x2−4=0x squared minus 4 equals 0
  x=2x=-22 lines; Line 1: x equals 2; Line 2: x equals negative 2 end-lines;   x=2x=-22 lines; Line 1: x equals 2; Line 2: x equals negative 2 end-lines;