Question

Oi can someone help me with this one ^{2}-12x-28=0
This is still pretty confusing for me

Answer 1

Both answers should be -2 and 14.

Explanation:

Using the quadratic formula:

`x^(2)-12x-28=0\\\\x=(-(-12)+-√((-12)^2-4(1)(-28)) )/(2(1))\\\\x= (12+-√(144+112) )/(2)\\\\x= (12+-√(256) )/(2)\\\\x= (12+-16 )/(2)\\\\x=6+-8`

Therefore:

`x_(1) =6+8=14\\x_(2)=6-8=-2`