How to evaluate 99 cube by using (90plus9)
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How to evaluate 99 cube by using (90plus9)
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Answer:
90 cube -729000
9 cube - 729
add them
Answer:
(90 +9)^3=90^3+3x90^2 x 9+3x90x9^2+9^3
= 729000+218700+21870+729
=970299