Question

Write the missing factor.
(d - 5)( ? ) = d^2- 25
A.
5 - d
B.
5 + 5d
C.
d - 5
D.
d + 5

Answer 1

Um we know the following:
\( (a+b)(a-b)=a^2-b^2\)
In your particular case you have \(d^2-25=d^2-5^2\)
Using the above information we have \[ (d+5) ( ?)=d^2-5^2\)
Can you take a guess what belongs in the bracket?

Answer 2

d + 5?

Answer 3

Yes :)

Answer 4

Can you help me with one more? @samjordon

Answer 5

waitttttt

Answer 6

that was wrong ,,,,,

Answer 7

look at my example (a+b)(a-b)=a^2+b^2
the signs between the 2 brackets must differ

Answer 8

d - 5?

Answer 9

Yes sorry

Answer 10

thats the correct answer

Answer 11

When factoring a trinomial of the form ax2 + bx + c where a, b, and c are all positive, you need to find two numbers, m and n, such that ax2 + bx + c = ax2 + mx + nx + c and __________.
A.m and n are both positive
B.m and n are both negative
C.m is positive, n is negative, and m > n
D.m is positive, n is negative, and n > m

Answer 12

I would most likely think its A
Since a and c is positive and m*n=a*c then m and n both must be negative or both must positive
Since b is positive and m+n=b so we can conclude that m and n must be positive