a²+3ab=145 ,If a =5 ,then what is the value of b²?
Solution
Correct Answer: Option B
দেওয়া আছে ,
a =5
অতএব , a²+3ab=145
বা, (5)²+3.5.b=145
বা, 25+15b=145
বা, 15b=`145-25
বা, 15b=120
বা, b=8
অতএব , b²=8²=64
a =5
অতএব , a²+3ab=145
বা, (5)²+3.5.b=145
বা, 25+15b=145
বা, 15b=`145-25
বা, 15b=120
বা, b=8
অতএব , b²=8²=64
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