Question

what must be added to 4 x square + 12 x + 5 to make it a perfect square
with explanation​

Answer 1

Answer:

-5/2 n -1/2

Step-by-step explanation:

$4x {}^{2} + 10x + 2x + 5 \\ 2x(2x + 5) + 1(2x + 5) \\ (2x + 5)(2x + 1) \\ 2x + 5 = 0 \\ 2x = - 5 \\ x = - 5 \ \div 2 \\ \\ 2x + 1 = 0 \\ 2x = - 1 \\ x = - 1 \div 2$