Question

If a = 3 and b = 5, find the value of (a-b)².​

Answer 1

Step-by-step explanation:

A+b=5 ab=3 then what is the value of a-b?

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(a+b)^2= a^2+b^2+2ab

Putting the value of a+b and ab we get,

a^2+b^2=25–6

a^2+b^2=19 *

Now,

(a-b)^2= a^2+b^2–2ab

Putting the value of a^2+b^2=19

We get, (a-b)^2=19–6

a-b= √13, -√13

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A+b=5

Then b=5-a

Substitution a(5-a)=3

5a-a(a)=3

a.a-5a+3=0

5+-√25–12

5+-13then a=5+√13

And a=5-√13

B=5-a

Then b=√13 and -√13

Then a-b is

I)5+√13-√13=5

II)5-√13-(-√13)=5

Finally ,the value of a-b is 5

Answer 2

Step-by-step explanation:

(3-5)^2

(-2)^2

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2 is the right answer

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