Solve for 'a' in the Quadratic Equation: 4x² = -4x + 16

Question

What is the value of a a in the equation 4x2=4x+16 4x^2=-4x+16 ?

Video Solution

Solution Steps

00:00 Find coefficient A
00:03 Arrange the equation so one side equals 0
00:20 Use the quadratic equation formula
00:26 We can see that coefficient A is for the X² term
00:31 Compare the formula to our equation to find coefficient A
00:34 And this is the solution to the question

Step-by-Step Solution

To solve the problem, we need to express the given equation 4x2=4x+16 4x^2 = -4x + 16 in the standard quadratic form ax2+bx+c=0 ax^2 + bx + c = 0 .

Let's perform the necessary transformations:
Rearrange the equation:

  • Start with: 4x2=4x+16 4x^2 = -4x + 16 .
  • Move all terms to one side to set the equation to zero:
    4x2+4x16=0 4x^2 + 4x - 16 = 0 .

We now have the standard quadratic form:
ax2+bx+c=0 ax^2 + bx + c = 0

In the equation 4x2+4x16=0 4x^2 + 4x - 16 = 0 , the coefficient of x2 x^2 is 4.

Thus, the value of a a is 4\boxed{4}.

Answer

a=4 a=4