Question

if the side of a square is increased by 8 cm, its area increased by 120 m² The side of the square is...
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Answer 1

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Answer 2

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let side of square be x, then area=x²,

Increase by 8cm = x+8 , then new area = (x+8)²,

Hence x²+120 = (x+8)²,

=x²+120= x²+64+16x,

=16x=120-64,

= x = 56/16,

= x = 3.5cm.

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