Question

x^2 - a^2 = (x+a)(x-a)

Use the polynomial identity above to rewrite x^2 −196
which is correct
x^2−196=(x−14)(x−14)

x^2 −196=(x−98)(x−98)

x^2 −196=(x+14)(x−14)

x^2 −196=(x+98)(x−98)

Answer 1

Use a^2 = 196 so a = 14. By x^2 − a^2 = (x + a)(x − a),

x^2 − 196 = (x + 14)(x − 14).

So the correct choice is: x^2 −196 = (x+14)(x−14).