Question

8) Solve: i)a³=8 i) b³+5 = 69 ​

Answer 1

Answer:

We know that formula,

a³+b³

then,

arrange in this form,

x³+2³

then,

following the formula,

a³+b³=(a+b)(a²-ab+b²)

then,

a=x

b=2

Now,

x²+2³=(x+2)(x²-2x+4)

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

a^3=8

=>a^3=2^3

=>a=2

b^3+5=69

=>b^3=69-5

=>b^3=64

=>b^3=4^3

=>b=4