Răspuns:
Explicație pas cu pas:
[tex]a) x^2 -6x + 9 = (x-3)^2\\b) x^2-8x + 16 = (x-4)^2\\c) x^2-10x + 25 = (x-5)^2\\d) x^2-12x + 36 = (x-6)^2\\e) 16x^2 - 8x + 1 = (4x-1)^2\\f) 25x^2-10x + 1 = (5x-1)^2\\g) 25x^2 - 20x + 4 = (5x - 2)^2\\h) 25x^2 - 60x + 36 = (5x - 6)^2\\i) 4x^2 - 28x + 49 = (2x - 7)^2\\j) 25 - 70x + 49x^2 = (5 - 7x)^2[/tex]