Question

X2 + 10x + x2 - 2x = 3x2 + 12

Answer 1

x = 6 or x = 2

Explanation:

If this is your question:

x^2 + 10x + x^2 - 2x = 3x^2 + 12

Then, move all the same variables to the same side:

x^2 + 10x + x^2 - 2x = 3x^2 + 12

x^2 + x^2 + 10x - 2x = 3x^2 + 12.... (a)

Second, based on the (a) equation, process substraction and addition:

x^2 + x^2 + 10x - 2x = 3x^2 + 12

2x^2 + 8x = 3x^2 + 12

x^2 - 8x + 12 = 0

(x - 6) (x-2) = 0

x = 6 or x = 2

Hope it helps. Thanks!