Question

q2 - 10q + 21 factories​

Answer 1

Answer:

we have to factorize this sum

According to the question

=q2-10q+21

= q2-7q-3q+21

= q (q-7)-3 ( q-7)

= (q-3) (q-7)

Answer 2

Step-by-step explanation:

q^2 - 10q + 21 = 0

q^2 - 7q - 3q + 21 = 0

q (q- 7) - 3 (q - 7) = 0

(q - 7) (q - 3) = 0

q = 7,3

Hope it helps.