What is the expression for "the difference of 3 and 5 times a number"
2 answers:
Answer: The required expression is .
Step-by-step explanation: We are given to write the following expression :
"the difference of 3 and 5 times a number".
Let the number be represented by x.
Then, 5 times x is written as 5x.
The difference of 3 and 5 times x ca be written as
.
Thus, the required expression is .
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the value of c that makes the expression a perfect square binomial is c=4 .
<u>Step-by-step explanation:</u>
Here we have , an expression x2 + 4x + c or , . We need to find the value of c that makes the expression a perfect square binomial. Let's find out:
We have ,
⇒
⇒
Now , we know that
Comparing above equation , to we get ;
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Therefore , the value of c that makes the expression a perfect square binomial is c=4 .