Can you please factor x^2-2x-31?

1 answer:

8 0

Multiply the coefficient of the first term by the constant 1 • -31 = -31

Find two factors of -31 whose sum equals the coefficient of the middle term, which is -2 .

-31 + 1 = -30
-1 + 31 = 30

Observation : No two such factors can be found !!
Conclusion : Trinomial can not be factored

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Please help me on this question (answer all parts please)

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SOLUTION:

Case: Volume of Sphere

Method:

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$\begin{gathered} V=\frac{4}{3}\pi r^3 \\ V=\frac{4}{3}\pi\times14\times14\times14 \\ V=11494.04\text{ }cubic\text{ }inches \end{gathered}$

b) When half of the volume is used,

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Final answer: (To 2 d.p)

a) 11494.04 cubic inches

b) 5747.02 cubic inches

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