Math, asked by abbu8400, 1 year ago

12 cube x + 18 cube x ends in

Answers

Answered by Ashishssingh2002
2
12 cube x +18 cube x = 7560
Answered by mysticd
1

 12^{3} x + 18^{3} x \\= ( 12^{3} + 18^{3})x \\= (12+18)[ 12^{2} - 12 \times 18 + 18^{2} ] x

 \underline { \blue { By \: Algebraic\: Identity }}

 \boxed { \pink { a^{3} + b^{3} = (a+b)(a^{2}-ab+b^{2})}}

 = 30( 144 - 216 + 324 )x \\= 30(468-216)x \\= 30 \times 252x \\= 7560x

Therefore.,

 \red{12^{3} x + 18^{3} x\: ends \: in } \green { 0 }

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