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(18-x) (18+x)=

Can anyone plz explain?
Exam tmrw??
555.2-324= 231.2
Thats why x= 9.63333..


                            hope you understood
1 5 1
y r u sad
Huh! Maths exam tmorrow.
best of ;0 luck
Thanx a lott :)
where here a is 18 
and b is x
so answer is 324-x^2
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