Which equation is quadratic in form?
6(x + 2)2 + 8x + 2 + 1 = 0
6x4 + 7x2 – 3 = 0
5x6 + x4 + 12 = 0
x9 + x3 – 10 = 0

Option A is correct

Step-by-step explanation:

We have been given four equations and we need to tell which one of them is quadratic

Case1:

In this we will use the formula

Here, a=x and b=2

The equation will become

Hence, after simplification equation will become

which is a quadratic equation because quadratic equation is the equation is the equation which has degree 2.

In this equation degree is 2 hence, quadratic

Case2:

 is not quadratic since, degree in this equation is 4 not 2

Hence, biquadratic not quadratic

Case3:

is not a quadratic equation since, degree in this equation is 6.

Hence, not quadratic

Case4:

is not quadratic since, degree in this equation is 9

Hence, not quadratic

Therefore, Option A is correct

answer: ♡♡♡♡♡♡♡♡♡♡

step-by-step explanation:

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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