9(3s-3t)-2t-10(8t+s)
2 answers:
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Answer:
Step-by-step explanation:
X^4 - 10X^2 + 9 =0 This factors. It just looks odd.
(x^2 - 1)(x^2 - 9) = 0
x^2 - 1 = (x + 1)(x - 1) = 0
x = 1 and x = - 1
x^2 - 9 = (x + 3)(x - 3) = 0
x = 3
x = -3
The correct answer is C (third one down).
Answer:
A. ()² =
×
=
Step-by-step explanation:
Answer choice (A) is the counterexample because squaring number results into number
which is less than
.