Answer:
Problem #1: x = 2.5
Problem #2: x = 10/7
Step-by-step explanation:
Step 1: Find the value of x in (8x - 20)
8x - 20 = 0
<u>Add 20 to both sides</u>
8x - 20 + 20 = 0 + 20
<em>8x = 20</em>
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<u>Divide both sides by 8</u>
8x / 8 = 20 / 8
<em>x = 2.5</em>
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Answer: x = 2.5
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Step 2: Find the value of x in (14x - 20)
14x - 20 = 0
<u>Add 20 to both sides</u>
14x - 20 + 20 = 0 + 20
<em>14x = 20</em>
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<u>Divide both sides by 14</u>
14x / 14 = 20 / 14
<em>x = 10/7</em>
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Answer: x = 10/7
There are many equations that equal 7 but here are a few
3+4=7
15-8=7
3.5*2=7
49/7=7
-35/-5=7
Answer:
The left side of the equation is ignored
i is treated as -1, which it is not, it is instead the square root of negative 1.
To solve it properly we get:
(2 - 5i)(5 + 2i)
= 10 + 4i - 25i - 10i²
= 10 + 21i + 10
= 20 - 21i
Whats the original question you got from your teacher
