Text Solve by factorising: x2−5x−14=0.x^{2}-5x-14=0.x2−5x−14=0. Solution Find two numbers with sum 555 and product −14-14−14: they are 777 and −2-2−2. x2−5x−14=(x−7)(x+2)=0 ⇒ x=7 or x=−2.x^{2}-5x-14=(x-7)(x+2)=0\;\Rightarrow\; x=7\ \text{or}\ x=-2.x2−5x−14=(x−7)(x+2)=0⇒x=7 or x=−2. x1=7,x2=−2 \boxed{\,x_1=7,\quad x_2=-2\,}x1=7,x2=−2