Question

Socorro me ajudem preciso logo por favor

Answer 1

Resposta:

Explicação passo a passo:

3x²-7x+2=0

Δ=(-7)²-4.3.2

Δ=49-24

Δ=

x=-(-7)±√25/2.3

x=7±5/6

x¹=7+5/6=12/6=2

x²=7-5/6=2/6=0,3

x²-9x+20=

(-9)²-4.1.20

81-80

x=-(-9)±√1/2.1

x=9±1/2

x¹=9+1/2=10/2=5

x²=9-1/2=8/2=4

x²+5x+4=0

5²-4.1.4

25-16

9

x=-5±√9/2.1

x=-5±3/2

x¹=-5+3/2=-2/2=-1

x²=-5-3/2=-8/2=-4