SAT Math Question of the Day

Q: x⁷ x² / x³ = ?

1. x⁶
2. x⁸
3. x¹¹
4. x¹²
5. x¹⁴

UNANSWERED.

The correct answer is A.

A: x⁶

Remember these exponent rules when the base (x) is the same:

1. When multiplying, you add the exponents.
   x^a x^b= x^a+b
2. When dividing, you subtract the exponents.
   x^a / x^b= x^a-b

If you forget the exponent rules when you're taking the SAT, just spell out the x's one at a time.
x⁷ x² / x³ is seven x's and two more x's on top and three x's on the bottom of the fraction.
xxxxxxx xx / xxx
Then simplify by crossing off an x on top for each x on the bottom of the fraction.
xxxxxx
6 x's make... x⁶