24
(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.
The answer is 4 squared minus 2 squared as 4 squared is 16 minus 2 squared, which is 4, gives you 12 as an answer.
{-1,7}
14x2-7x2-16 7x2-16 (this can't be simplified any more)
x^(2) - 10x + 16 = 0 Factors of '16', which are, 1,2,4,8,16. Select two numbers from this list that add/subtract to '10' . They are '2' and '8'. Setting up brackets ( x 2)(x 8) Since '16' is positive(+), then both signs must be the same. Since '10x' is negative (-) , then both signs are negative. Hence (x - 2)(x - 8 ) = 0 When x - 2 = 0 x = 2 & when x - 8 = 0 x = 8 So the two answers are ,2, & ,8, .
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
4x2/81 = 1 - 16x2/25100x2 = 25*81 - 16*81x21396x2 = 2025x2 = 2025/1396x = +/- 1.2044, approx.
16 squared equals 256.
9x squared plus 16 = 0 factored is plus and minus 4/3 i.
13X squared + 7X + 12
16
the answer of √8x+16-3x=0 is x= 0.447213595 = +/- 0.447(to 3 decimal places) if I'm not mistaken