Solve using the quadratic formula
(b-4) squared
4x2/81 = 1 - 16x2/25100x2 = 25*81 - 16*81x21396x2 = 2025x2 = 2025/1396x = +/- 1.2044, approx.
16
9x squared plus 16 = 0 factored is plus and minus 4/3 i.
{-1,7}
14x2-7x2-16 7x2-16 (this can't be simplified any more)
Solve using the quadratic formula
62 - 16 = 20
Your equation is not clear I can understand it in two ways (x2-16)/x-4+x2=16 x=-4.59486 x=-0.793499 x=4.38835 or x2-(16/x)-4+x2=16 x=3.50466 x=-0.864641 x=-2.64002
(b-4) squared
16 squared equals 256.
It is 25 minus 9 = 16
4x2/81 = 1 - 16x2/25100x2 = 25*81 - 16*81x21396x2 = 2025x2 = 2025/1396x = +/- 1.2044, approx.
9x squared plus 16 = 0 factored is plus and minus 4/3 i.
5 squared is 25 4 squared is 16 25-16= 9 the square root of 9 is 3.
16