2x(x-1) as a product and as a sum.

2x (x -1)

= (2x)(x+ -1)

= (2x(x) + (2x)(-1)

= 2x -2

now this part im not sure about but try this:

x + x - 1 - 1

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11-1 > 1-1+a

-12 > a

central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation: