Symbols:Plus or Minus/Examples

Examples of Use of Plus or Minus Symbol

Arbitrary Example $1$

Let $x^2 = 49$.

Then:

$x = \pm 7$

This means that the equation $x^2 = 49$ has $2$ solutions: $x = 7$ and $x = -7$.

Arbitrary Example $2$

Consider the expression $a = b \pm 2$.

This means that $a$ and $b$ are related by $a = b + 2$ or $a = b - 2$.