Question

20 POINTS QUESTION

CLASS IX

CHAPTER POLYNOMIALS

PLEASE TELL RIGHT SOLUTION

CORRECT SOLUTION WILL BE

GIVEN BRAINIEST FOR SURE !!!!!

Answer 1

HERE IS YOUR ANSWER

GIVEN THAT 3X-2Y=13 AND XY= 5

⇒BY USING THE FORMULA (a-b)³ = a³-3a²b+3ab²-b³

⇒then split the identity to make it easy to find

⇒like this= (x-y)³= x³-y³+3xy(x-y)

⇒(3x-2y)³= (3x)³ - (2y)³+ 3*5(3x-2y)

⇒(13)³= 27x³- 8y³ + 3*5(13)

⇒2197= 27x³- 8y³ + 15(13)

⇒2197 = 27x³-8y³ +195

⇒2197-195= 27x³- 8y³

⇒2002 = 27x³-8y³

∴ the value of 27x³-8y³= 2002

hope it helps

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