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.   Multiply (x + 3)(x – 3). A. x2 + 6x – 9 B. x2 + 6x + 9 C. x2 – 9 D. x2 – 6x + 9 help some says its C and some says its not
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.   Multiply (x + 3)(x – 3).

A. x2 + 6x – 9
  B. x2 + 6x + 9
  C. x2 – 9
  D. x2 – 6x + 9
help some says its C and some says its not

User Caj
by
9.2k points

1 Answer

3 votes
x × x = x^2
x × -3 = -3x
3 × x = 3x
3 × -3 = -9

x^2 + 3x - 3x - 9
So I would agree with C because the -3x and the 3x cancel each other out. I hope this helps!
User Tyeshia
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7.7k points
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