za rozwiązanie z góry dzięki .
(x+3)²=x²+2*x*3+3²=x²+6x+9
(4a+9c)²=(4a)²+2*4a*9c+(9c)²=16a²+72ac+81c²
(3x-4)²=(3x)²-2*3x*4+(-4)²=9x²-24x+16
(x+4)(x-4)=x²-4x+4x-16=x²-16
(x+3)^2 = x^2 + 6x + 9
(4a+9c)^2 = 16a^2 + 72ac + 81c^2
(3-4x)^2 = 9 - 24x + 16x^2
(x-4)(x+4) = x^2 +4x -4x -16 = x^2 -16
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(x+3)²=x²+2*x*3+3²=x²+6x+9
(4a+9c)²=(4a)²+2*4a*9c+(9c)²=16a²+72ac+81c²
(3x-4)²=(3x)²-2*3x*4+(-4)²=9x²-24x+16
(x+4)(x-4)=x²-4x+4x-16=x²-16
(x+3)^2 = x^2 + 6x + 9
(4a+9c)^2 = 16a^2 + 72ac + 81c^2
(3-4x)^2 = 9 - 24x + 16x^2
(x-4)(x+4) = x^2 +4x -4x -16 = x^2 -16