4. The perimeter of a rectangle is 16x2 + 10x + 6 and one of its sides is 8x2 + 3x. Find the other side.
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the perimeter of a rectangle is 16 x²+10x+6
and its one side is 8x²+3x
let the length of a rectangle be like and that if breadth be b
therefore, l= 8x²+3x
since we know that perimeter of a rectangle =
2(l+b)
16 x²+10x +6=2(8x²+3x+b)
16x²+10x+6=16x²+6x+2b
16x²-16x²+10x-6x+6=2b
4x+6=2b
therefore b= 2x+3
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