SAT I 一日一問(wèn):2015年2月16日
The correct answer is E
Explanation
When 3 is subtracted from x, the result is x minus 3. The square root of this difference is square root (x minus 3). When 5 is added to square root (x minus 3), the final result is 9. This can be written as (square root (x minus 3)) plus 5 = 9. Subtracting 5 from both sides gives the equation square root (x minus 3) = 4. Squaring both sides of this equation gives x minus 3 = 16, or x = 19.
- 相關(guān)熱點(diǎn):
- 初中英語(yǔ)必備詞組