Answer:
1. 9x²-1
2.
Value of x: 2
Lenght: 7
Width: 5
Area: 35cm²
Value of x: 3
Lenght: 10
Width: 8
Area: 80cm²
Value of x: 4
Lenght: 13
Width: 11
Area: 143cm²
Value of x: 5
Lenght: 16
Width: 14
Area: 224cm²
Step-by-step explanation:
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