Question

5x² -3x -2=0 equação de 2 grau Bháskara

Answer 1

5x²-3x-2=0

X=$\frac{-b+- \sqrt{Δ} }{2a}$

Δ=b²-4ac
Δ=3²-4*5*(-2)
Δ=9+40
Δ=49

X=-(-3)+-√49/2*5
X'=(3+7)/10=11/10=1
X"=(3-7)/10=-4/10= -0,4

Answer 2

5 x² - 3 x - 2 = 0
Δ = b² - 4 .a .c
Δ = (-3)² - 4 .5 . -2
Δ = 9 +40
Δ =  49 ⇒√49 = 7
x = -b + ou - 7/ 2,5
x´= -(-3) +ou- 7/10
x´= 3 + 7/10
x´= 10/10
x´=1
x´´ = 3 - 7/10
x´´ = -4/10
x´´ = -2/5
S ={-2/5;1}