Question

I) 2x²+x-4=0
ii) 2x²+x+4=0​

Answer 1

Answer:

(1) 2x² + x - 4 = 0

x = [-1 ± √(1 + 32)]/4

» x = [-1 ± √33]/4

(2) 2x² + x + 4 = 0

x = [-1 ± √(1 - 32)]/4

» x = [-1 ± i√31 ]/4

Answer 2

Answer:

(i) x=-√3/2

Step-by-step explanation:

x²+x/2 = 0

Now, by adding (1/4)² to both sides of the equations we get,

(2x)² + 2×2x + √3 + (√3)²=0

(2x +√3)²=0

(2x+√3)=0 and (2x+√3)=0

Therefore, either x= -√3/2