Question

ayudaaa!!!
(+x+6)(+x+3)=???
(+x-5)(+x-4)=???
(+x-2)(+x-4)=???

resuelvanlas porfavor

Answer 1

(+x+6)(+x+3)=
(x + 6) (x + 3) = 
[(x * x) + (x * 3) + (6 * x) + (3 * 3)] = 
[(x²) + (3x) + (6x) + (18)]
[x² + 3x + 18]
x² + 3x + 18
---------------------------------------------------
(x - 5) (x - 4)
x² - 4x - 5x + 20
x² - 9x + 20
-------------------------
(x - 2) (x - 4)
x² - 4x - 2x + 8
x² - 6x + 8