Answer: 2
Step-by-step explanation:
2.1 is the same as 21/10
which will give 2
Answer:
20:50
Step-by-step explanation:
2:5
They got 20 by multiplying 2 by 10 so we multiply 5 by 10 which is 50
Answer:
Step-by-step explanation:
We want to solve the equation:
Over the interval [0, 2π).
First, notice that this is in quadratic form. So, to make things simpler, we can let <em>u</em> = cos(x). Substitute:
Rearrange:
Factor:
Zero Product Property:
Solve for each case:
Back-substitute:
Using the unit circle:
The two solutions to the given quadratic equation are 2i/3, -2i/3 and they are both complex solutions.
Hence, option C is the correct answer.
<h3>What are the solutions to the quadratic equation?</h3>
Given the equation; 9x² + 4 = 0
First, we subtract 4 from both sides.
9x² + 4 = 0
9x² = -4
x² = -4/9
Take the square roots of both sides
x = ±√(-4/9)
Rewrite -4/9 as (2i/3)²
x = ±√(2i/3)²
x = ±(2i/3)
Hence,
x = 2i/3, -2i/3
Therefore the two solutions to the given quadratic equation are 2i/3, -2i/3 and they are both complex solutions.
Hence, option C is the correct answer.
Learn more about quadratic equations here: brainly.com/question/1863222
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The answer is B, 4(x-5)(x+3)
