What is x- 2 1/2 = 6 3/4. pls help

The given  0 = x + 2 + x2 can and should be re-written as  0 = 1x^2 + 1x   + 2.   thus, a=1, b=1 and c=2.   the discriminant is b^2-4ac, or 1^2-4(1)(2), or1-8=-7.because the discriminant is negative we have two complex roots.

The answer is you do negative time negative is always positive you do (-4(-4). (4)×(4) is positive 16

160*320*480*640*.5=7,864,320,000 cubic units.. hope this is correct but yet no promises..    : )