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BigorU [14]
3 years ago
11

What are roots of the equation -90=x (x-18)

Mathematics
1 answer:
daser333 [38]3 years ago
4 0

Answer:

-90=x(x-18)

-90=x^{2}-18x

0=x^{2}-18x+90

x=9+3i   or   9-3i

Step-by-step explanation:

you need to use quadratic formula and you will find square root a negative ( -9 ), which is an imaginary no.

square root (-9) = 3i

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Example
castortr0y [4]

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8 0
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4 years ago
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Simplify (3x+8)(x+1) using a table, the Distributive Property, and the FOIL
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FOIL stands for
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inner- multiply the inner term in each of the parenthesis
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Both methods are efficient, it all depends with the users preference
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