H²+10h+21 = 0
h²+3h+7h+21 = 0
h(h+3)+7(h+3) = 0
(h+3)(h+7) = 0
h+3=0
h = -3
h+7=0
h=-7
Answer:
<u>The correct answer is the letter C. </u>
Step-by-step explanation:
We can use the following trigonometric identity:
(1)
(2)
Solving each equation by b and equaling we have:


Let's recall that:
Then we have:

Using equation (1) we can find b.
Finally, we can find a using the next equation:

<u>Therefore, the correct answer is the letter C. </u>
I hope it helps you!
Answer:
You have to go on a cite called Math and Way buth without the and and no space between math and way
Step-by-step explanation: