Question

7a²+7b²=113, a=?
i want answer
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Answer 1

Answer:

a:b=3:5

Step-by-step explanation:

using componendo and dividendo

7a²+ 2b²+(7a²-2b²):7a²+2b²-(7a²-2b²)=113+13:113-13

7a²+2b²+7a²-2b²:7a²+2b²-7a²+2b²=126:100

7a²+7a²:2b²+2b²=126:100

14a²:4b²=126:100

a²:b²=126:100x4:14

a²:b²=9:25

a:b=3:5 (squaring)

Therefore a:b=3:5

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