x²- 4x - 5 pls answer this question frnds
Answers
Answered by
1
Answer:
(x+1)(x−5)
Step-by-step explanation:
Let's factor x2−4x−5
x2−4x−5
The middle number is -4 and the last number is -5.
Factoring means we want something like
(x+_)(x+_)
Which numbers go in the blanks?
We need two numbers that...
Add together to get -4
Multiply together to get -5
Can you think of the two numbers?
Try 1 and -5:
1+-5 = -4
1*-5 = -5
Fill in the blanks in
(x+_)(x+_)
with 1 and -5 to get...
(x+1)(x-5)
Answered by
0
Answer:
x^2 - 4x - 5 = 0
x^2 - 5x + x - 5 = 0
x(x-5) +1(x-5) = 0
(x+1)(x-5) = 0
x = -1,5
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