Simplify (c^2-6d^2)+(c^2-2cd+2d^2)

$(c^{2} - 6 d^{2}) + (c^{2} - 2 c d + 2 d^{2})$

Step 1

Remove parentheses.

$c^{2} - 6 d^{2} + c^{2} - 2 c d + 2 d^{2}$

Step 2

Add $c^{2}$ and $c^{2}$ .

$2 c^{2} - 6 d^{2} - 2 c d + 2 d^{2}$

Step 3

Add $- 6 d^{2}$ and $2 d^{2}$ .

$2 c^{2} - 4 d^{2} - 2 c d$