16x^2-64x+49=0

Solution for 16x^2-64x+49=0 equation:

16x^2-64x+49=0

a = 16; b = -64; c = +49;
Δ = b2-4ac
Δ = -642-4·16·49
Δ = 960
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{960}=\sqrt{64*15}=\sqrt{64}*\sqrt{15}=8\sqrt{15}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-64)-8\sqrt{15}}{2*16}=\frac{64-8\sqrt{15}}{32}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-64)+8\sqrt{15}}{2*16}=\frac{64+8\sqrt{15}}{32}
$