Question

4x2+12x+5=0 without formula​

Answer 1

Answer:

4×2+12x+5=0

8+12x+5=0

13+12x=0

12x=0-13

12x=-13

x=-13/12

x=-1.083

Answer 2

Answer:

$\frac{ - 1}{2} \: and \: \frac{ - 5}{2}$

Step-by-step explanation:

Given equation,

${4x}^{2} + 12x + 5 = 0 \\ {4x}^{2} + 10x + 2x + 5 = 0 \\ 2x(2x + 5) + 1(2x + 5) = 0 \\ (2x + 1)(2x + 5) = 0 \\ x = \frac{ - 1}{2} \: \frac{ - 5}{2}$

$The \: value \: of \: x \: is \: \frac{-1}{2} \: and \: \frac{-5}{2}$