Question

What is the length and width if the shape has a area of 150cm²

Answer 1

Answer: Length=15cm Width=10cm

Step-by-step explanation:l⋅w=A

let w=x

let I=x+5

A=(x+5)⋅x

and distribute:

150=x2+5x

move everything to one side:

x2+5x−150=0

factor:

(x+15)x(x−10)=0

x+15=0 ; x=−15

or

x−10=0; x=10

x≠−15

so x=10

length =15cm

width=10cm