Question

Ajutor!!!!
2. Efectuați , utilizând formula (a-b) la 2 =a la 2-2ab+b la 2
a) (x-2) la 2 =
b) (y+3) la 2=
c)(2x+1)la 2=
d) (3y+2) la 2=
e) (x+2y) la 2=
f) (2a+5b) la 2=
g) (b+3c) la 2 =
h)(3m+n) la 2=
i) (4x+z) la 2=
j)(6x+5a) la 2=

Answer 1

a. (x-2)^2=x^2-2*x*2+2^2=x^2-4x+4
b.(y+3)^2=y^2+2*y*3+3^2=y^2+6y+9
c.(2x+1)=(2x)^2+2*2x*1+1^2=4x^2+4x+1
d.(3y+2)^2=(3y)^2+2*3y*2+2^2=9y^2+12y+4
e.(x+2y)^2=x^2+2*x*2y+(2y)^2=x^2+4xy+4y^2
f.(2a+5b)^2=(2a)^2+2*2a*5b+(5b)^2=4a^2+20ab+25b^2
g.(b+3c)^2=b^2+2*b*3c+(3c)^2=b^2+6bc+9c^2
h.(3m+n)^2=(3m)^2+2*3m*n+n^2=9m^2+6mn+n^2
i.(4x+z)^2=(4x)^2+2*4x*z+z^2=16x^2+8xz+z^2
j.(6x+5a)^2=(6x)^2+2*6x*5a+(5a)^2=36x^2+60xa+25x^2

Succes!Coroana?