Question

x^2+5x-14=0

Answer 1

x=-7 and 2

Answer 2

(x+7)(x-2)=0

Answer 3

add 14 to both sides and you can factor to:
\[(x+\frac{5}{2})^2=\frac{81}4\]
after rooting and simplifying you should find:
x= -7; x=2

Answer 4

x^2+7x-2x-14=0
x(x+7)-2(x+7)=0
(x+7)(x-2)=0
x=-7,2