Math, asked by raha13, 11 months ago

if a+b=5, ab=6,then (a-b)=​

Answers

Answered by ishika5645
0

Answer:

-1 or 1 is the answer.

as you can take a=3 or a=2..

Step-by-step explanation:

as:

2+3=5

I.e

a+b=5

2×3=6

i.e ab=6

then,(a-b)=2-3=-1

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Answered by Anonymous
1

Answer:

hiii

your answer is here.

Step-by-step explanation:

1st case,

a + b = 5

a = 5 - b ........(i)

2nd case,

ab = 6

a = 6 / b .......(ii)

On equating equation (i) and (ii)

5 - b = 6 / b

b( 5 - b) = 6

5b - b2 = 6

0 = b2 - 5b + 6

b2 - (3 + 2)b + 6 = 0

b2 - 3b - 2b + 6 = 0

b ( b - 3) - 2 ( b - 3) = 0

( b -3) ( b - 2) = 0

Either,

b - 3 = 0

b = 3

Or,

b - 2 = 0

b = 2

Therefore, b = 3 and 2

Putting the value of b in equation (i)

When b = 3

a = 5 - b

a = 5 - 3

a = 2

When b = 2

a = 5 - b

a = 5 - 2

a = 3

Therefore, a = 2 and 3

So,

when a=2 and b = 3

a - b = 2 - 3

= -1

when a = 3 and b = 2

a - b = 3 - 2

= 1

Therefore, (a - b) = -1 and 1

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