Question

What is the area of rectangle whose length is (× +5) and width (× -5)?​

Answer 1

Answer:

well length=x+5 and breadth=x-5

area of rectangle is l×b

so area=(x+5) (x-5)

we all know the identity that a^2-b^2=(a+b) (a-b)

so area =x^2-25 is the area