Question

length=3x+1 breath=5-x find area of rectangle

Answer 1

area of rectangle =(3x-1)(5-x)

0=15x-3x2-5+x

3x2-16x+5=0

therefore area of rectangle =3x2-16x+5

Answer 2

$\huge\underline\mathfrak\red{ANSWER:-}$

$<b>Area of rectangle : -$

$l \times b \\ (3x + 1)(5 - x) \\ 3x(5 - x) + 1(5 - x) \\ 15x - 3x {}^{2} + 5 - x \\ 3x {}^{2} - 15x - x + 5 \\ 3x {}^{2} - 16x + 5$

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