lz54428
lz54428
17-12-2021
Mathematics
contestada
please help
im confushion
Respuesta :
raine0000
raine0000
17-12-2021
-18
You get [ a^2 - b^2 ] by multiplying the other 2 equations together using FOIL:
(a + b) (a - b) = a^2 - ab + ab - b^2 = a^2 - b^2
So:
6 (-3) = -18
Because it tells you a+b is 6 and a-b is -3
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