Question

5. Factorise: 100x²-80xy + 16y²​

Answer 1

$(10x - 4y) {}^{2}$

Step-by-step explanation:

$100x { }^{2} - 2(10x)(4y) + (4y) { }^{2}$

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

Answer 2

100x²-80xy+16y²

= (10x)² + (4y)²- 2×10x×4y

= (10x-4y)²