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soldier1979 [14.2K]
3 years ago
14

Solve x^2-8x-9=0 using the x method

Mathematics
2 answers:
Artist 52 [7]3 years ago
8 0

Answer: <em>x=9,-1</em>

Step-by-step explanation:

<em>First, we are gonna start out with finding two numbers that multiply to equal -9 and add up to equal -8</em>

<em>Those numbers would be -9 & 1</em>

<em>-9+1=-8</em>

<em>-9x1=-9</em>

<em>Now we have </em>

<em>(x-9)(x+1)</em>

<em>x-9=0   x+1=0</em>

<em>   +9 +9   -1  -1</em>

<em>x=9      x=-1</em>

Nikitich [7]3 years ago
6 0

Answer:

x=1,--9

Step-by-step explanation:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero x=1,--9

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Step-by-step explanation:

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2. To complete the square, you want to be able to put the quadratic into the form a(x -h)^2 = -k. For the purpose, it is most convenient to first factor "a" from the given quadratic. Then you can determine "-h" to be half the x-coefficient inside the parentheses.

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