Question

wykonaj mnożenie:

a)(2x+1)(2x+1),

b)(4x-5)(4x-5),

c)(6x-9)(6x+9)

Answer 1

a)(2x+1)(2x+1)=4x²+2x+2x+1=4x²+4x+1                                          (a+b)(a+b)=a²+ab+ba+b²

b)(4x-5)(4x-5)=16x²-20x-20x+25=16x²-40x+25

c)(6x-9)(6x+9)=36x²+54x-54x-81=36x²-81

Answer 2

a) 4x^2+2x+2x+1=4x^2+4x+1

b)16x^2-20x-20x+25=16x^2-40x+25

c)36x^2+54x-54x-81=36x^2-81 lub mozna od razu  =36x^2-81

 Prosze :D