Question

Identifying Simplified Expressions
Which expressions are in their simplest form? Check all that apply.
One-third + x Superscript 7
x Superscript negative 9 Baseline minus StartFraction 1 Over y EndFraction
StartFraction 1 Over x cubed EndFraction minus StartFraction 1 Over y Superscript 4 EndFraction
x cubed + StartFraction 1 Over y EndFraction minus t Superscript 6
x Superscript negative 5 Baseline minus y Superscript negative 4

Answer 1

Simplest:
- 1/3 + x^7
- 1/x^3 − 1/y^4
- x^3 + 1/y − t^6

Not simplest:
- x^(−9) − 1/y (has a negative exponent; write as 1/x^9 − 1/y)
- x^(−5) − y^(−4) (has negative exponents; write as 1/x^5 − 1/y^4)