Question

Me ajudemmm

y=3x²+12x+8


h(x)=-2x²-4x+7

Answer 1

A

a= 3

b= 12

c= 8

- 12 ± ✓ 12² - 4 × 3 × 8
_________________
2 × 3

- 12 ± ✓ 144 - 4 × 3 × 8
_________________
2 × 3

- 12 ± ✓ 144 - 96
_____________
2 × 3

- 12 ± ✓ 144 - 96
_____________
6

- 12 ± ✓ 48
_________
6

- 12 ± 4 ✓ 3
_________
6

- 12 + 4 ✓ 3
_________
6

- 12 - 4 ✓ 3
_________
6

Simplifique :

- 6 + 2 ✓ 3
_________
3

- 6 - 2 ✓ 3
_________
3

x' =

- 6 + 2 ✓ 3
_________
3

x" =

- 6 - 2 ✓ 3
_________
3

B )

a= -2

b= -4

c= 7

- 4 ± ✓ 4² - 4 × 2 × ( - 7 )
__________________
2 × 2

- 4 ± ✓ 16 - 4 × 2 × ( - 7 )
___________________
2 × 2

- 4 ± ✓ 16 + 56
____________
2 × 2

- 4 ± ✓ 16 + 56
____________
4

- 4 ± ✓ 72
________
4

- 4 ± 6 ✓2
________
4

- 4 + 6 ✓2
________
4

- 4 - 6 ✓ 2
_________
4

Simplifique :

- 2 + 3 ✓ 2
________
2

- 2 - 3 ✓ 2
________
2

x' =

- 2 + 3 ✓ 2
_________
2

x" =

- 2 - 3 ✓ 2
_________
2

Espero ter ajudado!!