Which equation is quadratic in form? 2(x + 5)2 + 8x + 5 + 6 = 0 x6 + 6x4 + 8 = 0 7x6 + 36x3 + 5 = 0 4x9 + 20x3 + 25 = 0

the equation that is quadratic in form among the listed equations is

which is the first equation on the list.   a quadratic equation is an equation   of degree 2, meaning that the highest order in the terms is , where is a constant.

to show clearly that this equation is quadratic, we have to expand the equation and show that in it's simplest form, the highest power in the equation is 2. the equation is expanded and simplified as shown below,

the highest power in the equation is 2. this confirms that this equation is quadratic in form. below i discus why the other equations are not quadratic in form.

the second equation is not quadratic because the highest power in the equation is 6. the third equation is an equation   of degree 6 so it can not be quadratic.   the 4th equation , is not quadratic because the highest power in the equation is 9.

clearly, the only quadratic equation in the list of equations is

v = 1/3 a^2h

step-by-step explanation:

if the height is 57.7cm and the height of the slant edge is 18.2cm, then the volume is 1/3 a^2h.