Question

the adjacent sides of a recyangle are 7x+3 and 4x-3.find the side of the rectangle ,if its perimeter is 68 cm?​

Answer 1

Answer:

Let a and b be two adjacent sides of rectangle.

Then we know perimeter of rectangle will be 2(a+b).

Here two adjacent sides are 2x2−5xy+3z2 and 4xy−x2−z2.

Thus perimeter = 2(a+b)=2(2x2−5xy+3z2+4xy−x2−z2)

=2(x2+2z2−xy)

=2x2+4z2−2xy