Question

1.(5c-x)(5c+x)=
(10z-8)(10z+8)=
(x-4)(x+4)=
(3-x)(3+x)=
(2x-1)(2x+1)=
(3/5x(trzy piąte)-1/2y)(3/5x+1/2y)=
(1/2x-6)(1/2x+6)=
2. (x+7) do kwadratu
(2x+1) do kwadratu
(4-x) do kwadratu
(2-2x) do kwadratu
(3x-6) do kwadratu
(3x-y) do kwadratu
proszę w miarę możliwości to rozpisać ;)

Answer 1

1). (5c-x)(5c+x)=25c kwadrat+5cx-5cx-x kwadrat=25c kwadrat-x kwadrat
(10z-8)(10z+8)=100z kwadrat+80z-80z-64=100z kwadrat-64
(x-4)(x+4)=x kwadrat+4x-4x-16=x kwadrat-16
(3-x)(3+x)=9+3x-3x-x kwadrat= -x kwadrat+9
(2x-1)(2x+1)=4x kwadrat+2x-2x-1=4x kwadrat-1
(3/5x-1/2y)(3/5x+1/2y)=9/25x kwadrat+3/10xy-3/10xy-1/4y kwadrat=9/25x kwadrat-1/4y kwadrat

(1/2x-6)(1/2x+6)=1/4x kwadrat+3-3-36=1/4x kwadrat-36
2).
(x+7) do kwadratu=x kwadrat+14x+49
(2x+1) do kwadratu=4x kwadrat+4x+1
(4-x) do kwadratu=16-8x+x kwadrat=x kwadrat-8x+16
(2-2x) do kwadratu=4-8x+4x kwadrat=4x kwadrat-8x+4
(3x-6) do kwadratu=9x kwadrat-36x+36
(3x-y) do kwadratu=9x kwadrat-6xy+y kwadrat