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" If "a+2b=5," prove that "a^(3)+8b^(3)+...

" If "a+2b=5," prove that "a^(3)+8b^(3)+30ab=125

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If a+2b=5, then show that a^(3)+8b^(3)+30ab=125 .

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If a + 2b= 5 , then show that: a^(3) + 8b^(3) + 30ab = 125

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If a+b+c=5 and ab+bc+ca=10 ,then prove that a^(3)+b^(3)+c^(3)-3abc=-25.

If a+b+c=5 and ab+bc+ca=10, then prove that a^(3)+b^(3)+c^(3)-3abc=-25 .

If a+b+c=5 and ab+bc+ca=10, prove that a^3+b^3+c^3-3abc=-25

If a + 2b = 4c , then prove that a^3+8b^3-64c^3+24abc=0