Question

factorise:16x² - 40xy + 25 y²​

Answer 1

Step-by-step explanation:

16x² + 40xy + 25y² = (4x)² +2.4x - 5y + (5y)² (4x + 5y)² = (4x + 5y) (4x + 5y)

Answer 2

$(4x - 5y) ^{2}$

Step-by-step explanation:

$(4x) {}^{2} - 2 \times (4 \times 5)xy + 5y {}^{2}$

it is of form

$(x - y) {}^{2} = (x {}^{2} - 2xy + y {}^{2} )$

here x=4x and y=5y