Question

Given f(x)=x2−3x+4, find f(−2)

Answer 1

f(x)=x^2-3x+4

`\\ \sf\longmapsto f(-2)`

`\\ \sf\longmapsto (-2)^2-3(-2)+4`

`\\ \sf\longmapsto 4+6+4`

`\\ \sf\longmapsto 10+4`

`\\ \sf\longmapsto 14`

Answer 2

• 14

Explanation:

Substitute x with -2 to find the value:

• f(-2) = (-2)² - 3(-2) + 4 = 4 + 6 + 4 = 14