Math, asked by janvijangid84, 4 months ago

Factorise q² - 10q + 21.

Answers

Answered by chavanprabhakar734
8

Answer:

 {q}^{2}  - 10q + 21

 {q}^{2}  - 7q - 3q + 21

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

(q - 7)(q - 3)

Answered by Avinash182007
2

Answer:

(q-3)(q-7)

Step-by-step explanation:

q^2 - 10q + 21 => Splitting the middle term method

=> -7 x -3 = 21.

(q^2 - 3q) - (7q + 21) (Sign will change as you multiply)

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

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

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