3 years ago

How do you factorise x^2 - 9.

1 answer:

4 0

X ^ 2 - 9

= x ^ 2 - 3 ^ 2

It turns into 3 ^ 2
Because 3 ^ 2 = 9

The final answer is
= ( x + 3 )( x - 3 )

remember the formula :

a^2 - b^2 =(a+b)(a-b)

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Which ordered pairs represent points on the graph of f(x)=-3 square root over -x ? Check all that apply. (–2, 2) (–1, –1) (0, 0)

Komok [63]

Answer:

(-1, -1), (0, 0)

Step-by-step explanation:

Assuming your function is the negative cube root of negative x, the two points listed above are on the curve. (The negatives cancel, so the function reduces to f(x) = ∛x.)

The various points relative to the curve are shown in the attachment.