1.

(23.1)^(2)+(48.6)^(2)-(39.8)^(2)=? + 1147.69

Answer»

`(13.6)^(2)`
`SQRT(12.8)`
163.84
12.8

Solution :`?+1147.69=(23.1)^(2)+(48.6)^(2)-(39.8)^(2)`
`:. ?=533.61+2361.96-1584.04-1147.69=163.84`


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