Question

1.2) Calcule:
a) (3 + x)² =
b) (x + 5)² =
c) ( x + y)² =
d) (x + 2)² =
e) ( 3x + 2)² =
f) (2x + 1)² =
g) ( 5+ 3x)² =
h) (2x + y)² =
i) (r + 4s)² =
j) ( 10x + y)² =
l) (3y + 3x)² =
m) (-5 + n)² =
n) (-3x + 5)² =
o) (a + ab)² =
p) (2x + xy)² =
q) (a² + 1)² =
r) (y³ + 3)² =
s) (a² + b²)² =
t) ( x + 2y³)² =
u) ( x + ½)² =

Answer 1

(a+b)^2= a^2+2ab +b^2

a) 9+6x+x^2

b) x^2+10x25

c) x^2+2xy+y^2

d) x^2+4x+4

e) 9x^2+12x+4

f) 4x^2+4x+1

g) 25+30x+9x^2

h) 4x^2+4xy+y^2

i) r^2+8rs16s^2

j) 100x^2+20xy+y^2

k)

l) 9y^2+18xy+9x^2

m) 25+-10n+n^2

(-5+n)^2=(-5+n)(-5+n)=

= 25-5n-5n+n^2

= 25-10n+n^2

n) 9x^2-30x+25

(-3x+5)^2=(-3x+5)(-3x+5)=

=9x^2-15x-15x+25

= 9x^2-30x+25

espero ter ajudado