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Cloud [144]
2 years ago
8

Please help I will give brainliest.

Mathematics
1 answer:
gogolik [260]2 years ago
6 0

Answer:

Options: 1, 4 & 6

Step-by-step explanation:

Yes:

1. -1(x-1)^{2} +9=-1(x^{2} -2x+1)+9=-x^{2} +2x-1+9=-x^{2} +2x+8

4. -x^{2} +2x+8

6. (x+2)(4-x)=2x-x^{2} +8=-x^{2} +2x+8

No:

2. -(x-9)^{2} +1=-(x^{2} -18x+81)+1=-x^{2} +18x+81+1=-x^{2} +18x+82

3. x^{2} +2x-8

5. (x+2)(x-4)=x^{2} -2x-8

Hope this helps

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Korolek [52]
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Procedure:

1) Given: 2x^2 - 5x - 12 = 0

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4) Notice that the common factor is (2x)

5) Set the parenthesis with the common factor inside:

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6) The first sign is the same sign of the second term of the trinomial, which is negative, the second sign is the product of the signs of the second and the third terms of the polynomial, which is (-)*(-) = + (positive)

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?

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