exam Maths Puzzle Numerical Ability

square root of x+1 + square root of x-1 = square root of 2x+1
Please help....if you can break it down to the simplest my book does not explain how to work with one that involves three radicals. Thank you so much

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exam Other Question

I have made many attempts to answer this equation and cannot come up with the answer - please help. The problem is -2(x-b)-(5a-x)=a+b During basketball season, emily scored 3 more than twice the number of points kayla scored. emily scored 251 points. write an equation that can be used to find the number of points, k. that kayla scored.

(3x)2=251

(3x) squared=251