Question

2b^2-36b+180=0 find what is b​

Answer 1

Answer:

b=12 or 6

Step-by-step explanation:

2b^2-36b+180 = 0 (1)

on dividing by 1/2 in equation (1) we get,

b^2-18b +90 = 0

(b)^2 -2(b)(9) +(9)^2 -(9)^2 +90 =0.

. [by using squaring method]

=>(b-9)^2 - 81 + 90 =0

=>(b-9)^2 = -9

=>(b-9)= +3or -3

=>b=(3+9). or. b=(-3+9)

b=12 or b= 6