Question

(a)²=(x+y)²-(x-y)² find the value of a?

Answer 1

this is ur answer I hope it might help u.byye

Answer 2

R.H.S. is in the form of (a)²-(b)²=(a+b)(a-b)
=>[(x+y)+(x-y)][(x+y)-(x-y)]
=>[x+y+x-y][x+y-x+y]
=>[2x][2y]
=>(a)²=[4xy]
=>a=√4xy
=>a=2√xy