without actual
actually
calculating the cubes
Find the value of each of the following-
a)(-12)3+(7)3+(5)3
b)(30)3+(20)3+(-50)3
Answers
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Answer:
(a) (-12)3+(7)3+(5)3
= -1728+343+125
= -1385+125
= -1260
(b) (30)3+(20)3+(-50)3
= 27000+8000+(-125000)
= 35000-125000
= -90000
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