Question

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

Answer 1

Answer:a^2+b^2+2ab =25

13+2ab=25

2ab=12

ab=6

hope it helps u

Step-by-step explanation:

Answer 2

Answer:

GIVEN A+B=5.......(1)

A²+B²=13....... (2)

FINDING AB=????

USING ALGEBRAIC IDENTITY (A+B) ²

(A+B) ²=A²+B²+2AB

FROM (1) AND (2)

HERE 5 IS TAKEN IN THE PLACE OF A+B....

AND 13 IS TAKEN IN THE PLACE OF A²+B²....

5²=13+2AB

25=13+2AB

-2AB=13-25

2AB=12

AB=12/2

AB=6

Step-by-step explanation:

THEREFORE AB =6