Question

a+b=8 and ab =15 find a and b​

Answer 1

Answer:

a= 3 and b= 5

3+5= 8

3×5= 15

Step-by-step explanation:

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Answer 2

ab=15

a=15/b

(15/b)+ b = 8

15+ b^2=8b

b^2-8b +15=0

b^2-3b-5b+15=0

b(b-3)-5(b-3)=0

(b-3)(b-5)=0

so, b = 3 or 5

If b=3

then a = 8-3=5

If b=5

then a=8-5=3

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