Math, asked by amd4815n, 8 months ago

if x+y=3 xy=2 find value of x³-y³​

Answers

Answered by sreejathallam
0

Step-by-step explanation:

7 is the required answer...refer to the attachment...

Attachments:
Answered by junaidkhan61
0

Step-by-step explanation:

Given:- x+y=3 ; xy=2

So (x-y)²=(x+y)²-4xy

(x-y)²=3²-4(2)

(x-y)²=9-8

x-y=√1

x-y=1.......................eq(1)

(x+y)²=x²+y²+2xy

3²=x²+y²+2(2)

9-4=x²+y²

x²+y²=5.................eq(2)

To find :- x³-y³

x³-y³=(x-y)(x²+y²+xy)

=1(5+2)=7

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