Answer:
√39
Step-by-step explanation:
An irrational number is a number that cannot be expressed by a fraction.
√9 = 3
√49 = 7
All whole numbers can be expressed as fractions and are <u>not</u> irrational numbers.
1.7 = 17/10 which is <u>not</u> an irrational number.

Find f(-5) by substituting x = -5 in the equation.

Therefore, the answer is f(-5) = 16
Answer:8_1
Step-by-step explanation: