Question

(x + 4)(x − 4)
Just wanna make shure this is right x^2-16?

Answer 1

Yes, because

(x + 4)(x - 4) = x(x - 4) + 4(x - 4) = x^2 - 4x + 4x + 16 = x^2 - 16

Answer 2

It's called difference of squares

Answer 3

ok sweet and then would (x + 4)(x + 4) be x^2+16

Answer 4

Negative

Answer 5

(x + 4)(x − 4)
x(x-4)+4(x-4)
x2-4x+4x-16
x2-16.

Answer 6

(x + 4)(x + 4) = x(x + 4) + 4(x + 4) = x^2 + 4x + 4x + 16 = x^2 + 8x + 16

Answer 7

It's called a perfect square trinomial.

Answer 8

ok i see

Answer 9

i have to compare and contrast

Answer 10

Any time you have
the sum of two numbers times their difference, (a + b)(a - b)
you get the difference of two squares: $$a^2-b^2$$

Answer 11

so how to i compare and contrast x^2 - 16 and x^2 + 8x + 16

Answer 12

The first is the difference of two squares: $$x^2 - 16=x^2-4^2$$

Answer 13

ok

Answer 14

One is a difference of squares, the other is a binomial square.

Answer 15

The second is the square of a sum $$(a+b)^2$$

Answer 16

$$(x + 4)^2$$

Answer 17

so the similarity is the 8x

Answer 18

There is no middle term in the difference of two squares.

Answer 19

wait x^2 is a similarity