Problem 5 A square picture is mounted in a frame 2cm wide. The area of the picture is 3/5 of the total area. Find the length of a side of the picture.
if someone could show me how they did the work. that would be lifsaving

if someone could teach me how to do this it would be lifesaving!

Question

Problem 5 A square picture is mounted in a frame 2cm wide. The area of the picture is 3/5 of the total area. Find the length of a side of the picture.
if someone could show me how they did the work. that would be lifsaving


if someone could teach me how to do this it would be lifesaving!

anonymous · Answer

help is much needed.. please

anonymous · Answer

s^2 = (3/5)(s + 4)^2

anonymous · Answer

The "+ 4" is from 2 cm on each side, making the frame side 4 cm longer than the picture.

anonymous · Answer

This will become a quadratic equation with "s" as the variable.

anonymous · Answer

@tcarroll010  is probably right. ignore my sketch.

anonymous · Answer

s^2 = (3/5)(s + 4)^2     ->

s^2 = (3/5)(s^2 + 8s + 16)

Put all terms on one side and set to 0 and solve for "s".  The equation is a parabola opening upwards.