Question

Date
Page No
If a - b = 7 and ab=2, Find a³-b³
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Answer 1

Step-by-step explanation:

(a-b) (a²+ab+b²)

(7)(a²+2+b²)

not sure about the answer.... pls check

Answer 2

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Answer:

a³-b³=385

Step-by-step explanation:

GIVEN:a-b=7 and ab=2.

TO FIND:Value of a³-b³

SOLUTION:We know that,

(a-b)³=a³-b³-3ab(a-b)

Now putting the values,

(7)³=a³-b³-3×2×7

343=a³-b³-42

343+42=a³-b³

a³-b³=385

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