Question

$(1 ^{3} + 2 {}^{3} + 3 ^{3} ) \frac{ - 5}{2}$
give answer fast
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Answer 1

(1³+2³+3³)×(-5/2)

=(1+8+27)×(-5/2)

=(9+27)×(-5/2)

=36×(-5/2)

=18×(-5)

=-90