Question

resolva a equação conpleta 2×^2 -5x +2=0

Answer 1

2x²-5x+2=0

Δ=(-5)²-4×2×2

Δ=25-16

Δ=9

x=-(-5)±√9/4

x'=5+3/4

x'=8/4==>2

x''=5-3/4

x"=2/4

x"=1/2

 ✿ ~Sah

Answer 2

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\mathsf{2x^2 - 5x + 2 = 0}$

$\mathsf{\Delta = b^2 - 4.a.c}$

$\mathsf{\Delta = (-5)^2 - 4.2.2}$

$\mathsf{\Delta = 25 - 16}$

$\mathsf{\Delta = 9}$

$\mathsf{y = \dfrac{-b \pm \sqrt{\Delta}}{2a} = \dfrac{5 \pm \sqrt{9}}{4} \rightarrow \begin{cases}\mathsf{x' = \dfrac{5 + 3}{4} = \dfrac{8}{4} = 2}\\\\\mathsf{x'' = \dfrac{5 - 3}{4} = \dfrac{2}{4} = \dfrac{1}{2}}\end{cases}}$

$\boxed{\boxed{\mathsf{S = \left\{2;\dfrac{1}{2}\right\}}}}$