SYNTENE LEARN . SAT MATH . ADVANCED MATH
If x^2 = 81 and x > 0, what is the value of x?
Answer: 9. 1) Take positive root of 81. 2) \sqrt{81} = 9.
Step-by-step solution
1) Take positive root of 81. 2) \sqrt{81} = 9.
Common mistake
Giving -9 too (but x > 0 rules it out).
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What is the answer to If x^2 = 81 and x > 0, what is the value of x?
Answer: 9. 1) Take positive root of 81. 2) \sqrt{81} = 9.
How do you solve it?
1) Take positive root of 81. 2) \sqrt{81} = 9.
What mistake do most students make?
Giving -9 too (but x > 0 rules it out).
What SAT topic is this?
Advanced Math. Practice more free Advanced Math questions with instant feedback at Syntene Learn.