Which expression is equivalent to 9x - (x – 3)(x + 1) + 10x?
-x2 + 19x+8
o -x2+26x+8
8x2+ 10x+8
8x2 + 26x+8

9x - (x-3)(x+1) +10x

Solving (x-3)(x+1) first

it implies x(x+1) -3 (x+1)

              = x^2 + x - 3x -3

              = x^2 -2x - 3

return the result into the original question

it gives: 9x - ( x^2 -2x -3) +10x

            expand

9x - x^2 +2x+3+ 10x

collect the like terms

- x^2 +21x +3

Step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

all you have to do is multiply them both to see how many out comes you can put:

3 x 2 = 6

you can make 6 diferent combinations of crusts and toppings.

~batmans wife dun dun