find this value fast
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1
Answer:
a+2b =10
take. cube both side
(a+2b)3= (10)3
(a)3+(2b)3+3(a)(2b)(a+2b) = 1000
a3+8b3+3(2)(15)(10) = 1000
a3+8b3+900= 1000
a3+8b3= 100
Answered by
0
Answer:
a+2b
cubing on both sides
(a+2b)3 = (10)3
a3+8b3=1000
formula=(a+b)3=a3+b3+3ab(a+b)
a=a ,b=2b
(a)3+(2b)3+3*a*2b(a+2b)=1000
a3+8b3+6ab*10=1000
a3+8b3+6*15*10=1000
Given in the question ab=15
a3+8b3+900=1000
a3+8b3=1000-900
a3+8b3=100
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