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Question

If twice the area of a smaller square is subtracted from the area of a larger square, the result is 14cm2. However, if twice the area of the larger square is added to three times the area of the smaller square, the result is 203cm2. Determine the sides of the square.

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Solution

Let the lengths of each side of the smaller square be x cm and that of the larger square be y cm.
Then, area of the smaller square=x2 cm2

y22x2=14....(i)
2y2+3x2=203....(ii)

From (i) we have
y2=14+2x2

Substituting this value of y2 in (ii) we get
28+4x2+3x2=2037x2=20328

7x2=175x2=25x=5cm

Putting x=5 in (i) we get

y22×52=14y2=64y=8

Hence the lengths of the sides of the square are 5cm and 8cm respectively

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