a - b = 5 and a2+b2 =53 find the value of ab
Answers
Answered by
22
(a-b)^2=a2+b2 -2ab
2ab=53-25
ab=14
2ab=53-25
ab=14
Answered by
30
Answer:
Step-by-step explanation:
a-b = 5
a^2+b^2 = 53
ab =?
Using the identity ;
(a-b)^2 = a^2+b^2-2ab
5^2 = 53 - 2ab
25 = 53-2ab
ab = 53-25÷2
ab = 28÷2
ab = 14
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