Question 10
SurdsIf K√28 + √63 − √7 = 0, find K.
- A.−2
- B.−1
- C.1
- D.2.
Show the answer and explanation
Answer: B (−1)
Explanation
√28 = 2√7 and √63 = 3√7, so 2K√7 + 3√7 − √7 = 0, giving 2K = −2 and K = −1.
If K√28 + √63 − √7 = 0, find K.
Answer: B (−1)
√28 = 2√7 and √63 = 3√7, so 2K√7 + 3√7 − √7 = 0, giving 2K = −2 and K = −1.