add 8√ 23 - √ 23
a. 7√23
b 8√ 23
c. 7√46
d. 8√ 46
To add 8√23 and √23, we can combine them by adding their coefficients together. The coefficients are 8 and 1.
So, 8√23 + √23 = (8 + 1)√23 = 9√23.
The correct answer is not provided in the options. The correct answer is 9√23.
To simplify the expression 8√23 - √23, we can combine like terms. Since both terms have the same radicand (√23), we can subtract their coefficients:
8√23 - √23 = (8 - 1)√23 = 7√23
Therefore, the simplified expression is 7√23.
So, the correct answer is a. 7√23.
To simplify the expression, you can combine the terms with the same radical. The expression "8√23 - √23" can be rewritten as "(8 - 1)√23", which simplifies to "7√23".
So the answer is option a) 7√23.