8. What is the product of the roots of x² - X- 12 = 0?
a. - 12
b. 1
c. - 1
d. 12
9. What is the sum of the roots of x² - 7x - 18 = 0?
a. - 18
b. 7
c.-7
d. 18
a. - 12
b. 1
c. - 1
d. 12
9. What is the sum of the roots of x² - 7x - 18 = 0?
a. - 18
b. 7
c.-7
d. 18
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Answer:
Incorrect. Remember that in standard form, the equation is written in the form ax2 + bx + c = 0.3x + x2 = 6 becomes 3x + x2 – 6 = 0, so the standard form is x2 + 3x – 6 = 0. This means the correct answer is a = 1, b = 3, and c = −6.
B) a = 1, b = 3, c = 6
Incorrect. You put the terms in the correct order, but the right side must be equal to 0. The c must be on the left side of the equation. 3x + x2 = 6 becomes 3x + x2 – 6 = 0, so the standard form is x2 + 3x – 6 = 0. This means the correct answer is a = 1, b = 3, and c = −6.
C) a = 1, b = 3, c = −6
Correct. 3x + x2 = 6 becomes 3x + x2 – 6 = 0, so the standard form is x2 + 3x – 6 = 0. This means a = 1, b = 3, and c = −6.
D) a = 3, b = 1, c = −6
Incorrect. Remember that in standard form, the equation is written in the form ax2 + bx + c = 0. You correctly found that 3x + x2 = 6 becomes 3x + x2 – 6 = 0. Putting the terms in order gives the standard form x2 + 3x – 6 = 0. This means the correct answer is a = 1, b = 3, and c = −6.
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:D brainly?