Question

$4x^{2}-12x+5=0$

Answer 1

4x² - 12x + 5 = 0
Δ = (-12)² - 4.4.5
Δ = 144 - 80
Δ = 64
√Δ = 8
x = 12+ ou - 8 /8
x' = 12+8/8
x' = 5/2
x'' = 12 - 8/8
x'' = 1/2

S={5/2, 1/2}