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Does each of the following result in X^2– 100? A (x-90) + (x – 10) B (x – 9)^2 – 19 C x(x – 100) D (x
Question
Does each of the following result in
X^2– 100?
A (x-90) + (x – 10)
B (x – 9)^2 – 19
C x(x – 100)
D (x + 10)(x – 10)
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Mathematics
3 years
2021-07-29T17:19:21+00:00
2021-07-29T17:19:21+00:00 1 Answers
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Answers ( )
Answer :
D – (x+10)(x-10)
Solution:
x^2 -100
= x^2 – 10^2
= (x+10)(x-10) { a^2 -b^2 = (a+b)(a-b)