Question

I need help with this problem

Answer 1

Explanation:

Solution,

Given:-

Length=x+4

Width=x-9

Now,

By applying the formula for area of rectangle, we get

Area=length×width

Area=(x+4)(x-9)

Area=x(x-9)+4(x-9)

Area=x²-9x+4x-36

Area=x²-5x-36

Answer 2

• L=x+4
• B=x-9

`\\ \sf\longmapsto Area=LB`

`\\ \sf\longmapsto Area=(x+4)(x-9)`

`\\ \sf\longmapsto Area=x(x-9)+4(x-9)`

`\\ \sf\longmapsto Area=x^2-9x+4x-36`

`\\ \sf\longmapsto Area=x^2-5x-36`