Area of rectangle whose sides are (2x - 7) and (2x + 7) is
Answer & explanation
Correct answer: option 4
Area of rectangle = length × breadth
= (2x - 7) × (2x + 7)
= (2x)2 - (7)2 [(a + b)(a - b) = a2 - b2]
= 4x2 - 49 square unit
Area of rectangle whose sides are (2x - 7) and (2x + 7) is
Correct answer: option 4
Area of rectangle = length × breadth
= (2x - 7) × (2x + 7)
= (2x)2 - (7)2 [(a + b)(a - b) = a2 - b2]
= 4x2 - 49 square unit