Question

facto rise the following and 3 times rotate the attachment

Answer 1

Answer:

(x + 1)(5x - 21)

Step-by-step explanation:

Given Equation is 5x² - 16x - 21

⇒ 5x² - 21x + 5x - 21

⇒ x(5x - 21) + (5x - 21)

⇒ (x + 1)(5x - 21).

Hope it helps you

#Bebrainly

Answer 2

Answer:

==> 5n²-16n-21 = 0

==> 5n²-21n+5n-21 = 0

==> n(5n-21) + 1(5n-21) = 0

==> (5n-21) (n+1) = 0

==> 5n-21 = 0  and n+1 = 0

    5n = 21    and n +1 = 0

   n = 21/5  and -1

i hope its helpful