Question

2x^2+x-90=0 solve by completing square​

Answer 1

Step-by-step explanation:

x^2 +1/2 x -45 = 0

(1/2 × coefficient of x)^2

x^2+1/2x -45 -1/4 +1/4 =0

(x +1/2)^2 = 45+1/4

(x +1/2)^2 = 181/4

(x +1/2)^2 = √181/2

x+ 1/2 = +/- √181/2

x +1/2 = √181/2 or x +1/2 = - √181/2

Hope it helps you buddy