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Q: X squared plus xx is equal to 15?

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IX (9) + XV (15) + XX (20) = XLIV (44)

X can't be solved, you don't have anything on the right side of the equal.

IXX (19) squared = -I(-I+XX)+XX(-I+XX) Multiplying out brackets = +I-XX-XX+CCCC Collecting like terms = -XXXX+CCCC+I (401-40) Then when simplified = CCCLXI (361) which is the correct answer. Remember that in maths a minus number multiplied by a minus number produces a plus number. Thus -I times -I is +I. David Gambell, Merseyside, England.

IXX isn't a valid Roman Numeral. XIX would be valid as would XXI. Perhaps it should be LXX? IXX (19) squared = -I(-I+XX)+XX(-I+XX) Multiplying out brackets = +I-XX-XX+CCCC Collecting like terms = -XXXXX+CCCC+I Then when simplified = CCCLXI (361) Remember that in maths a minus number multiplied by a minus number produces a plus number. Thus -I times -I is +I.

42,100,876,9765,098.6 xx :) All real numbers, except zero and one.

3xx + 2 + xx + 4 = 4xx + 6 = 2(2xx + 3)

no, because xx=x squared, and x squared is not linear

x=5 so it's 55+55= 110

First of all today we write out 19 in Roman numerals as XIX but the Romans themselves would have probably calculated 19 as XVIIII and then simplified it to IXX in fact the Latin word for IXX is 'undeviginti' which literally means one from twenty. So the question is: What is IXX squared? IXX squared = -I(-I+XX)+XX(-I+XX) Multiplying out the brackets = +I-XX-XX+CCCC Collecting like terms = -XXXX+CCCC+I (401-40) When simplified = CCCLXI (361) which is the answer to your question. Note that in maths a minus number multiplied by a minus number becomes a plus number. Thus -I times -I is +I.

30.5

true

XX or X*X, can be written as X squared. The inverse of a function "sort of cancels it out". I know the inverse of a square is the square root. Since we need the inverse of X squared, it's inverse is the square root of X. sqrt(x)

As l11 are not Roman numerals they cannot meaningfully be added to XX (20) to make any result.

1250

xx xx xx

xx xx xx

A thousand hope this helps xx

$46.xx/hr plus benefits.

2 points xx

There is no equation i the question so it has no properties.

September 15, 1835 xx

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Project XX - 1954 He Is Risen was released on: USA: 15 April 1962

One is a polynomial and the other is an equationA polynomial can (possibly) be factoredAn equation can (possibly) be factored and then solvedFactoring:xx+7x-30(x+10)(x-3)Solving:xx+7x-30=0(x+10)(x-3)=0Either (x+10) and/or (x-3) is equal to threex+10=0x=-10x-3=0x=3

Xx,Xx or Xx,xx or xx,xx