Question

Can someone please help me?
I need help with the guess and check factoring method.

Answer 1

I just looked at the first question, and I don't get how to do it at all :(

Answer 2

let me review it and i will give you the answer ok @quickstudent

Answer 3

I'll use x as the width and * as multiply to save confusion.

A = x^2+12x

A = width * length = x * l

As both equations are equal to area, we can equal them to each other:

x * l = x^2+12x

Factorise the right hand side. x is common so we can factorise it taking x out of the bracket giving:

x * l = x (x +12)

Since we have an x multiplied by something on both sides, we can divide everything by x to give us:

l = x+12


x = 10 feet

l = x +12
= 10 + 12
= 22 feet

A = x^2+12x
= (10)^2 + 12(10)
= 100 + 120
= 220 feet^2

or
A = w * l
= 10 * 22
= 220 feet^2

Hope this helps! :D @quickstudent

Answer 4

Hmmm, well I still don't understand how you used the guess and check method here.