What is the easiest way for solving the question of class 9th ncert math of exercise 2.5 of math of Polynomials chapter of question no.14(1) Please help me for the best suggestion of this question Without actually calculating the cubes, find the value of each of the following: (i) (−12)3+(7)3+(5)3
AnilSinghBoraGuru
Without actually calculating the cubes, find the value of each of the following: (i) (−12)3+(7)3+(5)3 Q.14(1)
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Let a = −12
b = 7
c = 5
We know that if x+y+z = 0, then x3+y3+z3=3xyz.
Here, −12+7+5=0
(−12)3+(7)3+(5)3 = 3xyz
= 3×-12×7×5
= -1260