Math, asked by Vansh77deadpoll, 1 year ago

if a + b + c is equals to 5 and a b + BC + c is equals to 10 then prove that a cube plus b cube plus c cube minus 3 ABC is equals to minus 25

Answers

Answered by shahruchitachip23651

Just put the formula of A3+b3+c3-3abc
Before that put the formula of a+b+c the whole square to get the value of a2+b2+c2 then put the values

shahruchitachip23651: (A+b+c)(a2+b2+c2-ab-bc-ca)

shahruchitachip23651: (a+b+c)2=a2+b2+c2(

shahruchitachip23651: +2ab+2bc+2ca

shahruchitachip23651: 25=a2+b2+c2+2(10)

shahruchitachip23651: =5

shahruchitachip23651: 10(5-10)

shahruchitachip23651: ohhh sorry 5(5-10)

shahruchitachip23651: =-25

shahruchitachip23651: hence proved

kunal460: it is not a proper answer for me i can solve this much by myself i am not able to solve it

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