Answer:
A. add 81;
Step-by-step explanation:
The perfect square formula
Rewrite expression as follows:
So, to form a perfect square, is missed.
When we add we will get
Determine the direction that is parabola opens: y = -5x^2 -10x -13
1 answer:
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Answer:
We have been given the equation:
And x=10
Substitute the given x in the given equation we get:
On simplification we get:
Required solution is: x= 10 and y=-20
The solution to the system of equation is those points that satisfy the given system of equations.
Keeping in mind that "dx" is the delta x, or differential over the x-axis, whilst "dy" is the delta y or differential over the y-axis,
You're trying to find constants 
such that 
. Equivalently, you're looking for the least-square solution to the following matrix equation.
To solve
, multiply both sides by the transpose of 
, which introduces an invertible square matrix on the LHS.
Computing this, you'd find that
which means the first choice is correct.
To solve
Computing this, you'd find that
which means the first choice is correct.