Question

please help me

or who know how to cheat on Dr. Frost Math?

Answer 1

Answer:

which is this app dr frost map

Answer 2

Given : Area of a rectangle  is given as 21.

and a quadratic equation is given $x^{2}+b x+c=0$.

Here we have to find the value of x.

We know that the Area of rectangle is given by

A = w * l.

where ,w is the width of rectangle and l is the length of rectangle.

from figure

l = x + 6

w = x +2

therefore

21 = (x +2) * ( x +6)

21 = $x^{2} +12x -9$

$x^{2} +12x -9 = 0$

Hence the final quadratic equation is $x^{2} +12x -9 = 0$