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Va rooooooooooooog ajutatimaaaaa!!!
(3x+2)(3x+2)
(4x-1)(4x+1)
(5-2x)(5+2x)
(6-5x)(6+5x)
(7-4x)(7+4x)
(4-9x)(4+9x)
Pleeease!!!!! Dau coroana!!!

Răspuns :

(4x-1)(4x+1)=4x la patrat - 1 la patrat
Ignatovvlad201
=(3x+2)²= 9x²+2x+4
=(4x)²-1²= 16x²-1
=5²-(2x)²= 25-4x²
=6²-(5x)²= 36-25x²
=7²-(4x)²= 49-16x²
=4²-(9x)²=16-81x²
formula(a-b)(a+b)=a²-b²

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