Question

Me ajuda obrigada kk o grupo B C e D

Answer 1

Grupo D:

a) a² + 20a + 100=
(a + 10)²

b) b^4 - 6b^2  + 9=
(b² - 3)²

c)25x^4 -70x²y +49y²=
(5x² - 7y)²

d)9a^2b^6 + 6ab^3 + 1=
(3ab³ + 1).(3ab³ + 1)=
(3ab³ + 1)²

e)x² + 2x/5 + 1/25 =
(x + 1/5)²

f) a^4.b^6/9 +2a^2b^3.c + 9c²=
(a²b³/3 + 3c)²

g) m^8n^6/100 - m^6.n^4/10 + m^4n^2/4=
(m^4.n^3/10 - m^2.n/2)²

h)x²/9 - 4xy/15 + 4y²/25=
(x/3 - 2y/5)²