Answer: b
explanation: only choice B equals -9 like the given equation.
Answer:
Real values of x where x < -1
Step-by-step explanation:
Above the x-axis, the function is positive.
The function is decreasing when the gradient is negative.
The function has a positive
coefficient, therefore the vertex is a local minimum;
This means the gradients are negative before the vertex and positive after it;
To meet the conditions therefore, the function must be before the vertex and above the x-axis;
This will be anywhere before the x-intercept at x = -1;
Hence it is when x < -1.
Answer:
* 5+2k+n
Step-by-step explanation:
Combine all like terms:
7-2 = 5
5k-3k = 2k
n = n