a = first side
b = second side
A = Area
b = a + 7
A = a * b
A = a * ( a + 7 )
A = a ^ 2 + 7 a
a ^ 2 + 7 a = 330
a ^ 2 + 7 a - 330 = 0
The exact solutions are:
a = -22
and
a = 15
The length can't be negative, so
a = 15 m
b = a + 7
b = 15 + 7
b = 22 m
A = a * b
A = 15 * 22
A = 330 m ^ 2
P.S.
If you don't know how to solve equation
a^2+7a-330=0
In google type:
quadratic equation online
When you see list of results click on:
Free Online Quadratic Equation Solver:Solve by Quadratic Formula
When page be open in rectangle type:
a^2+7a-330=0
and click option:
solve it!
You wil see solution step-by-step
a rectangle has an area of 330m^2 , one side is 7 m longer than the other
what are the dimensions of this rectangle
1 answer
1 answer