Thursday, January 15, 2009
Factoring Ep.7: Factor Difference of Squares - 7:19
Difference of squares are binomials with the function of subtraction separating the 2 terms. NEVER a positive value.
When Factoring such special quadratics:
i.) square root the first term and the second term
ii.) place the first value as the first term of 2 sets of binomials and the second value as the second term
iii.) in one set of binomials write a negative, and the second set a positive.
ie. x^2-81 = (x+9)(x-9)