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Let a and b be natural numbers. If a²+ab+a=14 and b²+ab+b=28, then(2a+b) equals?
Let a and b be natural numbers. If a²+ab+a=14 and b²+ab+b=28, then(2a+b) equals?
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Answer
a(a+b+1)=14 ...i
b(a+b+1)=28 ...ii
ii/i:
b/a=2
let a=x, b=2x
x(x+2x+1)=14
x=2,-7/3
for natural number x=a=2, b=4
