Question

Qual é a resposta 2x2-9x+4=0 me ajudem por favor

Answer 1

2x² -9x + 4 = 0

Δ = b² -4ac
Δ = -9² -4.2.4
Δ = 81 - 32
Δ = 49
√Δ = 7

x¹ = -b + √Δ / 2a
x¹ = 9 + 7 / 4
x¹ = 16/4
x¹ = 4

x² = -b - √Δ / 2a
x² = 9 - 7 / 4
x² = 2/4
x² = 1/2

Answer 2

∆=b^2-4.a.c
∆=-9^2-4.2.4
∆=81-32
∆=49

X=-(-9)+-√49/2.a
X=9+7/4
X=16/4
X=4

X=9-7/4
X=2/4
X=1/2

X'=8. X''=1/2