Question

If a + b = 5 and a^2 + b^2 = 13find ab.​

Answer 1

Step-by-step explanation:

a+b=5

squaring both side..we get,

a^2+b^2+2ab=25 eq--1

given that a^2+b^2= 13...

put the value in eq 1

13+2ab=25

2ab =25-13

ab=12/2

ab=6....

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