Bonjour,
3x² + 5x = x(3x+5)
2x² - 7x = x(2x-7)
2t² - 11t = t(2t-11)
7a² - 8a = a(7a-8)
7x² + 5x = x(7x+5)
2x² - x = x(2x-1)
14x + 7 = 7(2x+1)
9x² - 3x = 3x(3x-1)
7x - 14 = 7(x-2)
12t + 6 = 6(2t+1)
2t² - 8t = 2t(t-4)
4x² + 20x = 4x(x+5)
5(t+3) - (t+3) = 5(t+3) - 1(t+3) = (5-1)(t+3) = 4(t+3)
(2a-1)(a+2) + (2a-1)(4-a) = (2a-1)(a+2+4-a) = (2a-1)(6) = 6(2a-1)
(9r-3)(5r+2) + (4r+5)(9r-3) = (9r-3)(5r+2+4r+5) = (9r-3)(9r+7)
(-5b+2)(7b+1) - 3(7b+1)(2b+5) = (7b+1)[(-5b+2)-3(2b+5)] = (7b+1)(-11b-13)
= -(7b+1)(11b+13)
