Question

me ajude alguem ? por favor

Answer 1

-h² +22t - 85 = 0                (igualei a 0 pq pediu  t = 0)

Δ = b² -4ac
Δ = 22² -4 × -1 × -85
Δ = 484 - 340
Δ = 144

x = -b +/- √Δ ÷ 2a
x = -22 +/- √144 ÷ 2× -1
x = -22 +/- 12 ÷ -2

x' = -22 + 12 ÷ -2
x' = -10 ÷ -2
x' = 5

x" = -22 - 12 ÷ -2
x" = -34 + -2
x" = 17

Letra A