Asked by Charlie Benj
If the side of a square are extended to form a rectangle. One side of the square is extended by 5cm and the other side by 2cm. The area of the rectangle is 130cm^3. Find the length of the side of the square
Answers
Answered by
Reiny
"If the side of a square are extended to form a rectangle." ??
A sentence that begins with "If ..." must end with "then ...."
let the new sides be x+5 and x+2
(x+5)(x+2) = 130
x^2 + 7x + 10 - 130 = 0
x^2 + 7x - 120 = 0
(x-8)(x+15) = 0
x = 8 or x is a negative
the square was 8 by 8
A sentence that begins with "If ..." must end with "then ...."
let the new sides be x+5 and x+2
(x+5)(x+2) = 130
x^2 + 7x + 10 - 130 = 0
x^2 + 7x - 120 = 0
(x-8)(x+15) = 0
x = 8 or x is a negative
the square was 8 by 8
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