Can you factorise x2 - 16?

Answer 1

-14

Answer 2

YES!!!!

x^(2) -16 =

x^(2) - 4^(2) =

Remember two squared terms with a NEGATIVE (=) between them , factors to

(x - 4)( x + 4)

Note the different signs.

Done

NB Two squared terms with a positive (+) between them DOES NOT factor.

Answer 3

x2 - 16 = (x + 4)(x - 4). For a polynomial a2 - b2 = (a + b)(a - b)

Answer 4

4