Gmat Math > Exponents & quadratic equations > Flashcards
Fractional exponents
Numerator - power to raise base to
Denominator - root to take of base
X^-3
= 1/x^-3
x^2 - y^2
(x + y)(x - y)
x^2 + 2xy + y^2
= (x + y)(x + y) = (x + y)^2
x^2 - 2xy + y^2
= (x - y)(x - y) = (x - y)^2