Math, asked by piyush3755, 11 months ago

without actually calculating the cubes, find the value a) (-12)³+(7)³+(5)²,b) (28)³+(15)³-(-13)³ please help

Answers

Answered by Mayankbhadra

1

Use the identity, a³+b³+c³=3ab.

a) (-12)³+(7)³+(5)³

=3(-12)(7)(5)

=-36*35

= -1260

b)(28)³+(15)³-(-13)³

=3(28)(15)(-13)

=84*-195

=-16380

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