Question

Answer this question pls its urgent​

Answer 1

Answer:

Given : x²+y²=49

x-y=3

To find : x³-y³

Solution : We know that,

(a-b)² = a²-2ab+b²

So, (x-y)² = x² -2xy +y²

(3)² = 49-2xy (Given)

9 = 49-2xy

2xy = 49-9

2xy = 40

xy = 40/2

xy = 20

Now,

x³-y³ = (x-y)(x²+y²+xy) (Given and one proved)

x³-y³ = (3)(49+20)

x³-y³ = 207

So,the correct answer is (c)207.

Answer 2

Answer:

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