Answer:
+2Na
Step-by-step explanation:
its like algebra kinda when you have a 3y or 2x your Na ion is multiplied by 2 becoming 2Na
20 is the answer to this problem
Answer:
It's 576 if you mean 64 times 9!
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
In 13 - 17
Consider the factors of the constant term which sum to give the coefficient of the x- term
13
x² - x - 42 = (x - 7)(x + 6)
15
x² + x - 6 = (x + 3)(x - 2)
17
x² - 27x + 50 = (x - 25)(x - 2)
19
r² - 25 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b) , thus
r² - 25
= r² - 5² = (r - 5)(r + 5)
A is the answer of not I’m sorry for that
