Determine a raiz da funçãoY=2²×+3×+1

Question

Accepted Answer

x = (-b ± √ (b ²- 4 × a × c) ) / 2a
x = (-3 ± √ ( 3 ²- 4 × 2 × 1) ) / 2 × 1
x = (-3 ± √ 1) / 2
x1 = (-3 + 1) / 2
x1 = -2 / 2 = -1

x2 = (-3 – 1)/2
x2 = -4/2
x2 = -2

Resp:
X1 = -1
X2 = -2