Find the coordinate of center
of the ellipse
x2 + 36y2 + 12x = 0

(-6, 0).

Step-by-step explanation:

x^2 + 36y^2 + 12x = 0

Convert to standard form:

(x + 6)^2 - 36 +36y^2 = 0

(x + 6)^2 + 36y^2 = 36

Divide through by 36:

(x + 6)^2 / 36 + (y - 0)^2/ 36 = 1

Now compare this with the general form:

(x - h)^2/a^2 + (y - k)^2/ b^2  = 1

We see that the center (h, k) = (-6, 0).

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13