Diagonals of a rhombus 2

One diagonal of a rhombus is greater than other by 4 cm . If the area of the rhombus is 96 cm2, find the side of the rhombus.

Correct answer:

a =  10 cm

Step-by-step explanation:

u=4+v=4+12=16 S=96 cm2  S=uv2=(4+v)v2  96=(4+v)v/2  96=(4+v) v/2 0.5v22v+96=0 0.5v2+2v96=0  a=0.5;b=2;c=96 D=b24ac=2240.5(96)=196 D>0  v1,2=b±D2a=2±1961=2±141 v1,2=2±14 v1=12 v2=16   Factored form of the equation:  0.5(v12)(v+16)=0  v=v1=12 cm u=4+v=4+12=16 cm  a=(u/2)2+(v/2)2=(16/2)2+(12/2)2=10 cm

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