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zysi [14]
3 years ago
7

How to solve the system of equations algebraically over a set of real numbers

Mathematics
1 answer:
navik [9.2K]3 years ago
3 0
<span>Solve the following equation in the real number system. Please show all of your work.
example: 
x³-6x²-10x+12=0
...
f(x)=x³-6x²-10x+12
A graphing calculator will show that there is one zero at x=-2
Divide f(x) by (x+2) by long division or synthetic division
(x³-6x²-10x+12)/(x+2)=x^2-8x+6

solve for other two zeros
x^2-8x+6=0
complete the square
(x^2-8x+16)+6-16=0
(x-4)^2=10
x-4=±√10
x=4±√10=7.16 and -.84
ans:
x=-2, -.84 and 7.16</span>
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john paid $99 for one algebra book and two geometry book. the cost of a geometry book is $3 less than a algebra book. substituti
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Answer:

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Step-by-step explanation:

G=A-3

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5 0
3 years ago
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7 0
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Value of x 9(2x-1)-9x - 18
bixtya [17]
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</span></span></span>Combine Like Terms:<span>=<span><span><span><span>18x</span>+<span>−9</span></span>+<span>−<span>9x</span></span></span>+<span>−18</span></span></span><span>=<span><span>(<span><span>18x</span>+<span>−<span>9x</span></span></span>)</span>+<span>(<span><span>−9</span>+<span>−18</span></span>)</span></span></span><span>=<span><span>9x</span>+<span>−<span>27

</span></span></span></span>Answer:<span>=<span><span>9x</span>−<span>27</span></span></span>
5 0
3 years ago
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75 students in a kindergarten. 40% of them can read. how many can read?
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Answer:

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Step-by-step explanation:

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8 0
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