Calculate Rectangle Area: Finding x(x-4) with Variable Dimensions

Question

The width of a rectangle is equal tox x cm and its length is x−4 x-4 cm.


Calculate the area of the rectangle.

Video Solution

Solution Steps

00:00 Calculate the area of the rectangle
00:03 Apply the formula for calculating the area of a rectangle (side x side)
00:08 Substitute in the relevant values according to the given data and proceed to solve for the area
00:11 Expand the parentheses - multiply each factor
00:14 This is the solution

Step-by-Step Solution

The area of the rectangle is equal to the length times the width:

S=x×(x−4) S=x\times(x-4)

S=x2−4x S=x^2-4x

Answer

X2−4X X^2-4X

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Related Subjects

Calculating the Area of a Rectangle Area Rectangle Areas of Polygons for 7th Grade How do we calculate the area of complex shapes?

Question Types

Area of a Rectangle: Using variables