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Which of the following are sum and difference of two terms?
A. (x-9)(x-9)
B. (x+9)(x+9)
C. (x+9)(x-9)
D. (x-9)(x^2+9x+81)

What is the product of (n+5)(n-5)?
A. n^2-25
B. n^2+25
C. n^2+10n+25
D. n^2-10n+25

From the expressions (5x–2)(x–3), what are the inner terms? *
1 point
A. 2x , x
B. 2x , -1
C. -2 , x
D. -2 , -1

What is the third term in the product of the expression below?
(x+2y+3z)^2

A.9z^2
B.3z
C.9z
D.3z^2​