Question

Darius uses the polynomial identity (x−y)^2=x^2−2xy+y^2 to show that 9² = 81. What values can Darius use for x and y?

Answer 1

Answer:

Darius can use x=10 and y=1

Step-by-step explanation:

Darius wants to use the polynomial identity

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

to find 9²

Let x=10 and y=1

Then,

$(10-1)^2=10^2-2\times 10\times 1+1^2\\\\=100-20+1\\\\=80+1\\\\=81$

$(10-1)^2=81$

implies that 9² = 81

Hence, Darius can use x=10 and y=1

Answer 2

did you ever get the answer? if so, what was it?