Question

If a²+b²=13,a+b=5.find (a-b)²

Answer 1

a+b= 5

We know that,

(x+y)²= x²+y²+2xy

Here,

(a+b)²=(5)²

a²+b²+2ab= 25

We know that a²+b²= 13

13+2ab= 25

2ab= 25-13=12

ab= 12/2=6

Answer 2

Answer:

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Step-by-step explanation: