Question

Which is the value of the smaller zero defined by the function f (x) = 25x² – 4?

Answer 1

Let's see

`\\ \sf\longmapsto 25x^2-4=0`

`\\ \sf\longmapsto 25x^2=4`

`\\ \sf\longmapsto (5x)^2=2^2`

`\\ \sf\longmapsto 5x=2`

`\\ \sf\longmapsto x=(2)/(5)`

• Smallest zero 2/5