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bekas [8.4K]
2 years ago
5

How to factor this expression: x^2-9?

Mathematics
1 answer:
Lena [83]2 years ago
7 0

Answer:

(x+3)(x-3)

Step-by-step explanation:

rewrite "9" as 3^2

so it is x^2-3^2

You use the difference of squares: a^2-b^2=(a+b)(a-b)

apply it: (x+3)(x-3)

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*******. -4 **********













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2 years ago
What is the area of the figure:
Leni [432]
A <span>45 45 90 triangle
so a = b
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answer
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</span>
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