SOLUTION: This relates to unknown lenght & width of a rectangle with a known area:
How do I solve the equation? (How do I work out what formula to use?).
Area = 352 sq.cm
1 side = (X x
Algebra.Com
Question 74628: This relates to unknown lenght & width of a rectangle with a known area:
How do I solve the equation? (How do I work out what formula to use?).
Area = 352 sq.cm
1 side = (X x 2)
other side = (X + 9)
Iwant to show workings - rather than guessing at what X represents.
Answer by ptaylor(2198) (Show Source): You can put this solution on YOUR website!
YOUR PROBLEM IS NOT CLEAR.
What doesrepresent? Is it or is it ? I WILL ASSUME 2X
The area(A) of a rectangle equals Length(L) times Width(W)
Either 2X is the length and (X+9) is the width or visa versa--it makes no difference which we choose. So our equation to solve is:
A=L*W
get rid of parens
divide both sides by 2
subtract 176 from both sides
quadratic in standard form
A=1
B=9
C=-176
We'll solve using the quadratic formula:
cm
cm------------------------------length
cm-----------------------------width
We will discount the negative solution for x since lengths and widths are not negative numbers.
CK
A=L*W
352 sq cm=(19.018)(18.509)
352=~352
Hope this helps----ptaylor
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