X^2-15=0. Find solutions?
回答 (2)
2017-01-18 2:01 pm
✔ 最佳答案
x² - 15 = 0x² - (√15)² = 0
(x - √15)(x + √15) = 0
x = √15 or x = -√15
There are TWO real number solutions.
2017-01-18 2:03 pm
x² -15=0
add 15 both sides
x² =15
x = ±√15
add 15 both sides
x² =15
x = ±√15
收錄日期: 2021-04-18 16:05:18
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