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krok68 [10]
3 years ago
5

A square has a side that is (x-3) units long. If the area of the square is 126.5625 sq units, what is the value of x?

Mathematics
1 answer:
Kitty [74]3 years ago
4 0

Answer:

14.25 units

Step-by-step explanation:

Area of a square= l*b= (x-3)(x-3)=x^{2}-3x-3x+9=x^{2}-6x+9

x^{2}-6x+9=126.5625

x^{2}-6x-117.5625

Solving the equation using quadratic equation then as attached

x=14.25 units

To prove

x-3=14.25-3= 11.25 units

area=11.25*11.25=126.5625 sq units

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