Question

what must be added to
$9 {x}^{2} - 24x + 10$
to make it a perfect square
​

Answer 1

Answer:

6

Step-by-step explanation:

9x²-24x + 10

(3x)² - 2× 3x × 4 + 10

To make it a perfect square,

It should be of a²+b²-2ab form. ( where a=3x and b= 4)

Therefore, b² = 16

Therefore, 16-10 = 6 must be added to make it a perfect square.