Verified answer

(i) (-10)³ + (7)³ + (3)³ = we know That

if a+b+c = 0 then,

a³+b³+c³ = 3abc

So ,it's a+b+c = -10 + 7 + 3 = 0

then,

(-10)³ + (7)³ + (3)³ = 3(-10)(7)(3) = 3 × -10 × 21 = -630

(ii) Similarly By Above Process ,

we have,

a+b+c = 28+(-15)+(-13) = 0

So , (28)³ + (-15)³ + (-13)³ = 3(28)(-15)(-13)

= 3×(-420)(-13) = 16380

(iv) here , a+b+c = 0.2 + (-0.3) + 0.1 = 0

So , (0.2)³- (0.3)³ + (0.1)³ = 3(0.2)(-0.3)(0.1)

= 3×(-0.006)

3×(-0.006) = 0.018

Hope this Helps You

(i) (-10)³ + (7)³ + (3)³

We know that if a + b + c = 0, then, a³+ b³ + c³ = 3 abc

So, it's a + b + c = -10 + 7 + 3 = 0 then, (-10)³ + (7)³ + (3)³ = 3(-10)(7)(3)

= 3 × -10 × 21

= -630

(ii) Similarly By Above Process,

We have, a + b + c = 28 + (-15) + (-13) = 0

So, (28)³ + (-15)³ + (-13)³ = 3(28)(-15)(-13)

= 3×(-420)(-13)

= 16380

(iv) Here, a + b + c

= 0.2 + (-0.3) + 0.1 = 0

So, (0.2)³- (0.3)³ + (0.1)³=3(0.2)(-0.3)(0.1)

= 3×(-0.006)

= 0.018

I am Srijoyee Maity from Kolkata, West Bengal.

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