Bonjour,
[tex]7x-14 = 7(x-2)\\ 12x^2-2x+6 = 2(6x^2-x+3)\\ x^2+3x = x(x+3)\\ 4b^2-12 = 4(b^2-3)\\ 2t^2-3t = t(2t-3)\\ 4x^2+20x = 4x(x+5)\\ \frac 14a^2-\frac 12 = \frac 12 \left(\frac 12a^2 - 1\right)\\ \frac 32x^2 + \frac 94x = \frac 32x\left(x+\frac 32\right)[/tex]
