Question

Can someone please find the area

Answer 1

Answer:
`49x^2-42x+9`

Explanation: The area of a square is determined by the length of its side. In this case, the length of the side varies with an unknown variable x, therefore the area will also be a variable (dependent on x in a quadratic way):

`A=(7x-3)(7x-3)=49x^2-42x+9`

Example: if x is 1:

`x=1\implies\,\,\mbox{side}=4 \,\,\mbox{ft}\\49\cdot 1^2-42\cdot 1+9=16 \,\,\mbox{sq.ft}`