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986388
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Answer:
x = -1
Step-by-step explanation:
You can use rational root test to check for rational roots.
Factors of 8: 1, 2, 4, 8
Factors of 7: 1, 7
Possible rational roots: ±1/1, ±1/2, ±1/4, ±1/8, ±7/1, ±7/2, ±7/4, ±7/8
Checking, we find that -1 is a root. Knowing that, we can use grouping to factor:
8x³ − x + 7
8x³ + 8x² − 8x² − x + 7
8x² (x + 1) − (8x² + x − 7)
8x² (x + 1) − (8x − 7) (x + 1)
(8x² − (8x − 7)) (x + 1)
(8x² − 8x + 7) (x + 1)
Using the quadratic formula, we find that 8x² − 8x + 7 has no real solutions.
Therefore, the only solution is x = -1.
Answer:
Step-by-step explanation:
The scale factor describes the size of an enlargement or reduction. For example, a scale factor of means that the new shape is twice the size of the original. A scale factor of means that the new shape is three times the size of the original.
To convert 2.4 into a radical you have to write the equation;
2.4=√x; then you square both sides, to get x by itself, resulting in 5.8; and then you have to write; "2.4 in radical form is the square root of 5.8
