Question

A rectangle Is (2x-3) cm long and (x+7) cm wide. What Is It's area?​

Answer 1

`2x^(2)` + 11x -21
`cm^(2)`

Explanation:

Area of a rectangle = Length × Width

= (2x-3)(x+7)

Multiply 2x with x, 2x with +7, -3 with x and -3 with +7

=
`2x^(2)` + 14x - 3x - 21

=
`2x^(2)` + 11x -21
`cm^(2)`

Answer 2

Explanation:

Length (L)= 2x - 3 cm

Breadth (b) = x + 7 cm

Area of the rectangle

= L * b

= ( 2x - 3)(x+ 7)

= 2x(x + 7) - 3(x + 7)

= 2x² + 14x - 3x - 21

=( 2x² + 11x - 21) cm²

hope it helps