Factor Completely:
x²-x-42
2 answers:
Answer: (x-7)(x+6)
Step-by-step explanation:
plz mark brainliest
Factoring means we want something like
(x+_)(x+_)
Which numbers go in the blanks?
We need two numbers that...
Add together to get -1
Multiply together to get -42
Can you think of the two numbers?
Try 6 and -7:
6+-7 = -1
6*-7 = -42
Fill in the blanks in
(x+_)(x+_)
with 6 and -7 to get...
(x+6)(x-7)
Answer:
The answer to your question is: (x - 7)(x + 6)
Step-by-step explanation:
x² - x - 42
Find the prime factors of 42
42 2
21 3
7 7
1 42 = 2 x 3 x 7
Then -7 + 6 = -1 and (-7)(6) = -42
( x - 7)(x + 6) = 0
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