Question

28. Solve the equation by quadratic formula: 2x² + x-4 = 0.​

Answer 1

Step-by-step explanation:

Answer

The given quadratic equation is 

2x2+x−4=0

⇒x2+2x−2=0

⇒x2+2x=2

On adding both sides 161 we get

x2+2x+161=2+161

⇒(x+41)2=1633

⇒x+41=±433

⇒x=±433−41

⇒x=4−1−33,4−1+