(07.05)
2 answers:
Answer:
b. -2
Step-by-step explanation:
3n + 2 ( n + 2 ) = 9n + 12
[To simplify, multiply 2 with n and 2]
3n + 2n + 4 = 9n + 12
5n + 4 = 9n + 12
[Add 2n and 3n]
5n + 4 - 9n = 12
[Sign of 9n would change when it's moved from one side of the = to the other]
5n - 9n = 12 - 4
[Similarly, sign of 4 would change from + to -]
- 4n = 8
n = 8/-4
n = -2
Hope this helps :D
You might be interested in
Answer:
- No real roots
Step-by-step explanation:
Given equation:
- x² + 2x + 3 = 0
On comparing the equation by ax² + bx + x = 0, We get: a = 1, b = 2 and c = 3
To Find the nature of the roots of the equation firstly we need to find the discriminant of the equation. The expression b²- 4ac is called the discriminant.
- Two Distinct real roots, if b² - 4ac > 0
- Two equal real roots, if b² - 4ac = 0
- No real roots, if b² - 4ac < 0
The discriminant is smaller than 0.
- <u>Hence, Equation has no </u><u>real</u><u> roots (no solution)</u>