arivalen
13.01.2021 •
Mathematics
If you subtract 14 from my number and multiply the difference by -4, the result is -40 what is peters number?
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Ответ:
Given expression:
The first root is valid when:
2x + 2 ≥ 0 ⇒ 2x ≥ - 2 ⇒ x ≥ - 1The second root is valid when:
6 - 4x ≥ 0 ⇒ 4x ≤ 6 ⇒ x ≤ 1.5So the variable x can get values within interval:
-1 ≤ x ≤ 1.5 orx = [-1, 1.5]