Question

Solve for the value of X squared.

Answer 1

Step-by-step explanation:

x² + y² = 153 and y = -4x.

=> x² + (-4x)² = 153

=> x² + 16x² = 153

=> 17x² = 153

=> x² = 9.

Answer 2

Answer:

x² = 9

Step-by-step explanation:

x² + y² = 153 ----------------------(I)

      y = -4x ----------------------(II)

Plugin y = -4x in equation (I)

x² + (-4x)² = 153

x² + 16x² = 153

  17x²     = 153

           x² = 153/17

         x² = 9

        x = √9

      x = 3