Question

under what condition will ax² + 5x + 8 =0 be a quadratic equation (a)a>0 (b) a < 0 (c) a =0​

Answer 1

Answer:

Considering the equations to be:

ax

2

+2cx+b=0...(1)

ax

2

+2bx+c=0...(2)

(2)-(1) gives

2(b−c)x+c−b=0

2(b−c)x=b−c

2x=1

∴x=

2

1

From (1)

ax

2

+2cx+b=0

a(

2

1

)

2

+2c

2

1

+b=0

a+4c+4b=0

Step-by-step explanation:

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Answer 2

Answer:

Considering the equations to be:

ax2

+2cx+b=0...(1)ax2+2b

x+c=0...(2)

(2)-(1) gives

2(b−c)x+c−b=0

2(b−c)x=b−c

2x=1

∴x=21

From (1)ax2+2cx+b=0

a(21)2+2c21+b=0

a+4c+4b=0