MATH SOLVE

2 months ago

Q:
# HELP QUICK DUE TODAYFrom a square cardboard sheet, a 3 cm wide strip was cut away. The area of the remaining rectangular cardboard sheet is 70 cm². Find the original dimensions of the square cardboard sheet.

Accepted Solution

A:

area = S^2

S(S-3) =70

S^2 -3S = 70

S^2 - 3s-70 = 0

(s-10) (s+7) = 0

s = 10, s=-7

S=10

original dimension was 10cm x 10cm

S(S-3) =70

S^2 -3S = 70

S^2 - 3s-70 = 0

(s-10) (s+7) = 0

s = 10, s=-7

S=10

original dimension was 10cm x 10cm