Answer:
Step-by-step explanation:
The quadratic can be solved in a straightforward way:
This tells you that the solutions are ...
2i or -2i
__
For each root of "a", (x -a) is a factor. Thus the factors of the equation are ...
(x +2i)(x -2i)
2x - y = 9
3x + 4y = -14
To solve this system using elimination, one of the pairs of variable terms must cancel each other out. Their coefficients must be opposites of each other.
Multiply the top equation by 4.
2x - y = 9
4(2x - y = 9)
8x - 4y = 36
Add the equations together.
8x - 4y = 36
3x + 4y = -14
+___________
11x - 0 = 22
11x = 22
x = 2
Substitute 2 for x into either of the original equations to find y.
2x - y = 9
2(2) - y = 9
4 - y = 9
-y = 5
y = -5
Finally, check work by plugging x- and y-values into each original equation.
2(2) - (-5) = 9 --> 4 + 5 = 9 --> 9 = 9 --> True
3(2) + 4(-5) = -14 --> 6 - 20 = -14 --> -14 = -14 --> True
Answer:
x = 2 and y = -5; (2, -5).
Answer:
wrong
Step-by-step explanation:
(a+b)^2=(a+b)(a+b)
=a(a+b)b(a+b)
=a^2+ab+ab+b^2
=a^2+2ab+b^2
i hope it helps you
You plug in the values for x in each respective equation.
a) f(3) = 3 + 1 which equals: 4.
so, f(3) = 4
b) g(3) = (3)^2 - 3 which equals 9 - 3, which equals 6.
so, g(3) = 6.
hope this helps! (:
