What number multiplied by itself is equal to the product of 8 and 98?
回答 (4)
2016-06-21 2:49 pm
8 multiplied by 98 is 784
Sq. root of 784 is 28.
Therefore 28 x 28 = 98 x 8
Answer is 28.
Sq. root of 784 is 28.
Therefore 28 x 28 = 98 x 8
Answer is 28.
2016-06-21 2:51 pm
Let n be the number.
n × n = 8 × 98
n² = (2² × 2) × (2 × 7²)
n² - (2² × 2² × 7²) = 0
n² - 28² = 0
(n + 28)(n - 28) = 0
n = -28 or n = 28
The number is -28 or 28.
n × n = 8 × 98
n² = (2² × 2) × (2 × 7²)
n² - (2² × 2² × 7²) = 0
n² - 28² = 0
(n + 28)(n - 28) = 0
n = -28 or n = 28
The number is -28 or 28.
2016-06-21 2:48 pm
28
sq rt of (8 x 98)
sq rt of (8 x 98)
2016-06-21 9:45 pm
x² = 784
x = 28 is the number
x = 28 is the number
收錄日期: 2021-04-18 15:11:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160621064704AA8Rz5t