Question

Add. x−2x2−6x+8+x−4x2−16

Answer 1

Step 1. Gather like terms

$(x-6x+x)+(-2 x^{2} -4 x^{2})+8-16$

Step 2. Simplify

$-4x-6 x^{2}+8-16$

Step 3. Simplify

$-4x-6 x^{2}-8$

Done!