Math, asked by plabade9716, 24 days ago

if a+b = 7 and ab=10, find

Answers

Answered by kadamgeeta31
0

Answer:

 -  + 3

Step-by-step explanation:

Given, (a+b)=7, ab=10

Squaring both sides

⇒(a+b)

2

=7

2

⇒a

2

+b

2

+2ab=49

⇒a

2

+b

2

=49−2(10)

⇒a

2

+b

2

=29

Now,

(a−b)

2

=a

2

+b

2

−2ab

=29−2(10)

=29−20

=9

∴a−b=

9

=±3

Answered by shahvaibhavi497
0

Answer:

Given, (a+b)=7, ab=10

Squaring both sides

⇒(a+b)

2

=7

2

⇒a

2

+b

2

+2ab=49

⇒a

2

+b

2

=49−2(10)

⇒a

2

+b

2

=29

Now,

(a−b)

2

=a

2

+b

2

−2ab

=29−2(10)

=29−20

=9

∴a−b=

9

=±3

hope it's helpful.

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