This site is 100% ad supported. Please add an exception to adblock for this site.

GRE algebra

Terms

undefined, object
copy deck
inequalities
  • do whatever is necessary to both sides to isolate the variable
  • REMEMBER: when multiplying or dividing both sides by a NEGETIVE number, you must REVERSE the sign
square roots

√n= the non-negetive number which squared equals n

  • there are 2 numbers when squared: n, -n
  • √n means the NON-NEGETIVE square root
multiply monomials
2a*2a=(2*3)(a*a)=6a2
raising a power to a power
(Xa)b=X(a*b)=Xab
exponents
X3=X*X*X
multiplying and dividing powers

Xa*Xb=X(a+b)

 

Xa÷Xb=X(a-b) 

multiplying and dividing radicals

√a x √b= √a*b= ab

 

√a/√b= √a/b= √x 

powers of fractions

raising a fraction b/t 0 and 1 to a power yields a number smaller than the original:

 

combining like terms
2a + 3a = 5a

solving a quadratic equation:

what are the possible values of X? 

x2+12=7x

  • put 7x on left
  • set equal to zero
  • factor left side
  • set (x-4)=0 (x-3)=0
  • solve for x to give the possible values of x 

Deck Info

10

bpullar

permalink