Jen factored x² - 4x - 21 as (x - 3)(x + 7) What did she do wrong?
2 answers:
Jen should have done (x+3)(x-7) bc the middle value of the original equation needs to be equal to the two numerical values added together from the factored equation
Answer:
She didn't put the sign's in the proper place, it should be ( x + 3 ) ( x - 7 )
Step-by-step explanation:
( x - 3 ) ( x + 7 ) = x² + 7x - 3x - 21 = x² + 4x - 21
( x + 3 ) ( x - 7 ) = x² - 7x + 3x - 21 = x² - 4x - 21
You might be interested in
Answer:
lol i have same
Step-by-step explanation:
Answer:
17/15
Step-by-step explanation:
hope this helps!
Answer:
the answer is $332.35 hope this helps
2x-11 = k
add 11 to each side
2x-11+11 = k+11
2x = k+11
divide each side by 2
x = (k+11)/2
