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mamaluj [8]
2 years ago
6

(x+1)^2-(x-1)^2 dont kbow what to do

Mathematics
1 answer:
marshall27 [118]2 years ago
6 0

Use this formula a2 − b2 = (a + b)(a − b)

<span>(x+1)^2-(x-1)^2  in this case, a = x+1, b = x-1</span>

<span>= [(x+1) + (x-1)] *  [(x+1) – (x-1)]</span>

=(x +1 + x – 1) *(x +1 – x +1)

= 2x * 2

<span>=4x</span>

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