Question

as raizes da equacao 2x ao quadrado-7x+3=0 A)1 E 2 B)-3 E 1/2 1/2 E 3

Answer 1

$2 x^{2}$ - 7x +3=0
usa a  fórmula  de bhaskara
Δ=b²-4ac
Δ(-7)²-4*2*3
Δ=49-24
Δ=25

X=(-b+-√Δ)÷2.a
X¹=-(-7)+√25$\frac{-(-7)_+ \sqrt{25} }{2*2}$
x¹=(7+5)÷4
x¹=3

x²=$\frac{-(-7)_- \sqrt{25} }{2*2}$
x²=(7-5)÷4
x²= 2/4 ÷2 ⇒1/2