91Ó°ÊÓ

A mathematical expression is a combinations of numbers and variables ordered with mathematical operations.

Power of a product rule states that if the two exponents of the same base are multiplied then the exponents are added and base remains the same.

$a^m.a^n=a^{m+n}$

Where,$a$ is any non-zero real number.

Area of the rectangle $\left(A\right)=$ lengthrole="math" localid="1647949562671" $×$width ……….. (1)

Observe the figure.

The shape of the parking lot is like a rectangle.

The length of the parking lot units

The width of the parking lot units

Use the equation (1).

The area of the parking lot to be paved is

$\begin{array}{c}A=\left(5x−4\right)\left(2x+3\right)\\ A=5x\left(2x+3\right)−4\left(2x+3\right)\\ A=5x\left(2x\right)+5x\left(3\right)−4\left(2x\right)−4\left(3\right)\end{array}$

Use the power of a product rule.

Therefore, the area of the parking lot to be paved is $10x^2+7x−12$units².