Question

2) DETERMINE O DISCRIMINANTE DE CADA EQUAÇÃO

A) 2x²+12x + 18 =0

B) x² -4X+ 9 = 0

C) 25x²- 20x + 4 =0

D) x² +2X-15=0

E) x² + 3x +2 = 0

F) x² + x – 12 = 0

G) x² - 2x + 1 = 0

H) x² + 6x– 9 =0

I) x² - 4x - 5 = 0

J) -x² + x + 12 = 0

K) -x² + 6x - 5 = 0

L) 6x² + x - 1 = 0

M) 3x² - 7x + 2 = 0

AJUDEM AI PFVR É PRA HJ.​

Answer 1

Resposta:

A)▲= 12²-4×2×18

▲= 144-4×2×18

▲= 144-8×18

▲= 144-144

▲=0

B) ▲=(-4)²-4×1×9

▲= 16-4×1×9

▲=16-36

▲=-20

C) ▲=(-20)²-4×25×4

▲=400-4×25×4

▲=400-100×4

▲=400-400

▲=0

D)▲=2²-4×1×(-15)

▲=4-4×(-15)

▲=4+60

▲=64

E) ▲=3²-4×1×2

▲=9-4×2

▲=9-8

▲=1

F) ▲=1²-4×1×(-12)

▲=1-4×1×(-12)

▲=1-4×(-12)

▲=1+48

▲=49

G) ▲=(-2)²-4×1×1

▲=4-4×1×1

▲=4-4

▲=0

H) ▲=6²-4×1×(-9)

▲=36-4×1×(-9)

▲=36-4×(-9)

▲=36+36

▲=72

I) ▲=(-4)²-4×1×(-5)

▲=16-4×1×(-5)

▲=16-4×(-5)

▲=16+20

▲=36

J) ▲=1²-4×(-1)×12

▲=1-4×(-1)×12

▲=1+4×12

▲=1+48

▲=49

K) ▲=6³-4×(-1)×(-5)

▲=36-4×(-1)×(-5)

▲=36+4×(-5)

▲=36-20

▲=16

L) ▲=1²-4×6×(-1)

▲=1-4×6×(-1)

▲=1-24×(-1)

▲=1+24

▲=25

M) ▲=(-7)²-4×3×2

▲=49-4×3×2

▲=49-12×2

▲=49-24

▲=25

Explicação passo-a-passo:

▲=b² -4×a×c