1.

Find the value of a2+b2 when a+b=5 and ab =13

Answer»

ANSWER:

Here's your answer

Step-by-step explanation:

GIVEN,

a + b = 5 and a

2

+b

2

=13

On SQUARING a + b = 5 both sides, we get

(a+b)

2

=(5)

2

a

2

+b

2

+2ab=25

13+2ab=25⇒2ab=25−13=12

⇒ab=12/2=6

∴ab=6

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