Question

If a-b =7, ab=8, find a²+b²​

Answer 1

Answer:

If a-b = 7 and ab=8, then what is a^2+b^2?

a-b = 7 then

a = 7+b —————— (1)

ab=8 then

putting ‘a’ value as above

7+b (b) = 8

7+b^2 = 8 then b^2 = 8–7 which means, b^2 = 1 ————— (2)

Now apply this to a^2+b^2

Let’s imagine a^2+b^2 = 0 then,

a^2+1 = 0 [applying the value of (1) for b^2] then,

a^2 = -1 ———————- (3)

Now we have values of a^2 and b^2, lets apply to a^2+b^2

(-1) + 1 = 0

Hence , a^2+b^2 = 0

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

keep first and second equations as 1 and 2 u will get a=8 and b= 1 there fore answer is 65