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Vika [28.1K]
3 years ago
15

Write a quadratic function f(x) for the area of a rectangle length x+5 width 3x-7

Mathematics
1 answer:
Semmy [17]3 years ago
7 0
The area of a rectangle is the product of its length and width.
l=x+5 \\
w=3x-7 \\ \\
A=lw=(x+5)(3x-7)=3x^2-7x+15x-35=3x^2+8x-35 \\ \\
\boxed{f(x)=3x^2+8x-35}
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