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Earn +20 ptsQ: 20x to the power 2 plus 18x plus 4?
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How do you solve 11x equals 20x Plus 18?
11x = 20x +1811x-20x=18x(11-20)=18-9x=18x=-2
Factor x to the fourth power plus 2x to the third power minus 9x to the second power plus 18x?
x4 + 2x3 - 9x2 + 18x = x(x3 + 2x2 - 9x + 18) which I do not think can be factorised further.
20x plus 7 equals 5x plus 10?
20x+7=5x+10 15x=3 3/15=.2 x=.2
X2 plus 20x plus 4 equals 0?
x2 + 20x + 4 = 0 x2 + 20x + 100 = 96 (x + 10)2 = 96 x + 10 = ±961/2 x = -10 ±961/2 x = -10 ±4√6
How do you get 81-18x plus xsquared from (9-x)squared?
Because: (9-x)(9-x) = 81-18x+x^2
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