Question

if a - b = 2 and ab = 3, then a^3 - b^3 =​

Answer 1

Step-by-step explanation:

if a - b = 2 and ab = 3, then a^3 - b^3 = answer 2

Answer 2

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if a - b = 2 and ab = 3, then a³ - b³ =

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a - b = 2

a=2+b

ab = 3

(2+b) (b) = 3

b² + 2b - 3 = 0

By solving the above equation,

we get, b = 1 or -3

if b=1

a=3

a³-b³ = 3³ -1³

= 27 - 1

= 26.

b = -3 b'coz it doesn't satisfies given conditions of a & b.

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