Question

completati spatiile punctate cu expresiile corespunzatoare,pentru a obtine propozitii adevarate:
a.(x+y)la 2=x la 2+2xy+.......
b.(x+2)la2=x la 2+6x+.......
c.(x-1)la2=xla2-.........+1
d.(x-4)la2=x la 2-.......+16
e.(2x+3)la2=4xla2+......+9
f.(3x-7y)la2=........xla2-..........xy+......yla2
Cine ma ajuta dau coroana va rog repede

Answer 1

Bună,

a) (x+y)² = x²+2xy+y².
b) (x+2)² = x²+4x+4.
c) (x-1)² = x²-2x+1.
d) (x-4)² = x²-8x+16.
e) (2x+3)² = 4x²+12x+9.
f) (3x-7y)² = 9x²-42xy+49y².


Succes!

Answer 2

a)( x+y)la 2=x la 2+2xy+y la 2
b)(x+2) la 2=x la 2 + 4x+ 4
c)(x-1)la 2=x la 2 -2x +1
d)(x-4)la 2=x la 2 -8x+16
e)(2x+3) la 2=4x la 2+12x+9
f)(3x-7y)la 2 =9x la 2-42xy +49y la 2