Question

Factorise the fallowing 25y square - 20y + 4​

Answer 1

Answer:

${25y}^{2} - 20y + 4$

${25y}^{2} - (10 + 10) y + 4$

${25y}^{2} - 10y - 10y + 4$

$5y(5y - 2) - 2(5y - 2)$

$(5y - 2)(5y - 2)$

Ans. (5y - 2) (5y - 2)

Hope it helps.

Answer 2

$= 25 {y}^{2} - 20y + 4$

$= 25 {y}^{2} - (10 + 10)y + 4$

$= 25 {y}^{2} - 10y - 10y + 4$

$= 5y(5y - 2) - 2(5y - 4)$

$= (5y - 4)(5y - 2)$