Question

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Answer 1

plz follow me if my ans is right

Answer 2

Answer:

208, -208

Step-by-step explanation:

x-y=4

xy=12

(x+y)²=x²+y²+2xy

        =x²+y²+2xy-2xy+2xy

        =(x²+y²-2xy) + 4xy

        =(x-y)² + 4xy

        =4² + 4×12

        = 16 + 48

        = 64

therefore, (x+y)² = 64

x+y = √64

x+y = ±8

solving, x-y=4 and x+y= ±8

we get, (x=6,y=2) and (x=-2,y=-6)

therefore, x³-y³ = 6³-2³ = 216-8 = 208

and (-2)³-(-6)³ = 8-216 = -208