If a-b= 9 and a^2+b^2=281, find the value of ab Choose the most appropriate option
A) 100
B) 12
C) 15
D) 18
E) 19
2ab = (a^2 + b^2) - (a - b)^2   = 281 - 81= 
<gadget id="calculator">281 - 81</gadget>
<output>200</output>
200=&gt; ab = 100   100NSWER:100
<result>A</result>
If a-b= 9 and a^2+b^2=281, find the value of ab