Question

please solve it the question​

Answer 1

Answer:

Step-by-step explanation:

(7) ∛-19600 × ∛8960

=∛-19600×8960

=∛-2²×7²×10²×2⁷×7×10

=-∛2⁹×7³×10³

=-2³×7×10=-8*70= - 560

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(8) x+y=31

   x-y=3

adding 2x=34,x=17

so y=31-17=14

Now x³+y³=(x+y)(x²+y²-xy)

=31*[(x-y)2+xy)]

=31*( 3²+14*17)

=31*(9+238)

=31*247

=7657

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(9)factors of 4000 are

4000=4*10³

4000=2×2×10³

Multiply by 2  both sides

2*4000=2×2×2×10³

=2³×10³=

=(20)³

hence multiply by 2 makes 4000 as cube

Ans=2

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(10) 17³=17*17*17

=289*17

=4913

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