1. 15
2. 5
3. Flashcards
Pretty sure this is right, good luck!
(2-5i)(4+7i)=2(4+7i)-5i(4+7i)=8+14i-20i-35i²
recall that i²=-1,
8-6i+35=43-6i
43-6i is the final answer
No, not at all.
The general quadratic equation is
Ax² + Bx + C = 0 .
The roots are real only if (B² - 4AC) is not negative.
That means if you graph it, it touches or crosses the x-axis.
If the graph is up in the air and never touches the x-axis,
then it has no real roots.
<h2>
Conditional statement.</h2>
A mathematical statement of the form 'If A Then B' is a conditional statement.
<h3>
Explanation:</h3>
A conditional statement in geometry is an if-then statement consisting of a hypothesis and a dependent conclusion. The structure of a conditional statement is:
<em>If (......hypothesis......), then (......conclusion......)</em>
If hypothesis = A and conclusion = B, the mathematical expression for a conditional statement is: <u>A → B</u> and it is read as <u>If A then B.</u>
A conditional statement is always true unless the hypothesis is true and the conclusion is false.
A conditional statement can be written in form of its converse, inverse and contrapositive.
<u>Example of a conditional statement is</u>
A = I am 18 years old
B = I am an adult
A conditional statement is of the form (<u>A → B</u>) "If A then B"; therefore
If I am 18 years old, then I am an adult.
