Answer:
Darius can use x=10 and y=1
Step-by-step explanation:
Darius wants to use the polynomial identity
[tex](x-y)^2=x^2-2xy+y^2[/tex]
to find 9²
Let x=10 and y=1
Then,
[tex](10-1)^2=10^2-2\times 10\times 1+1^2\\\\=100-20+1\\\\=80+1\\\\=81[/tex]
[tex](10-1)^2=81[/tex]
implies that 9² = 81
Hence, Darius can use x=10 and y=1
I don't know what the actual answer is but I do know that the tutor answer is wrong because it is not an option.
