The area 3

The area of a rectangle is given by the expression 4x2 + 5x -6. What is the length of the rectangle if its width is x+2?

Correct answer:

l = 4x-3

Step-by-step explanation:

S=4x2 + 5x 6 w = x+2  S = w l 4x2 + 5x 6 = (x+2) l  4x2+5x6=0  4x2+5x6=0  a=4;b=5;c=6 D=b24ac=5244(6)=121 D>0  x1,2=2ab±D=85±121 x1,2=85±11 x1,2=0.625±1.375 x1=0.75 x2=2  l=4(x0.75)  l=4x3

Our quadratic equation calculator calculates it.

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Are you looking for help with calculating roots of a quadratic equation?
Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?

You need to know the following knowledge to solve this word math problem:

We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions: