2.
If a : b = 2:5, find the value of (3a2 - 2ab + 5b2) : (a2 + 7ab - 262).
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Step-by-step explanation:
According to the question, a=2x,b=5x
Then, putting the values f a,b in the given ratio 3.2.2-2.2.5+5.5.2 : 4+7.2.5-262=9:94
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