Question

(5х-3)(5х+3)=4х(3х+2)

Answer 1

25 хв квадрате -9 =12хв квадрате+8х

13хв квадрате-8х-9=0

Д=64-4*13*(-9)=532 

Answer 2

$(5x-3)(5x+3)=4x(3x+2)$

$(5x)^2-3^2=12x^2+8x$

$25x^2-9-12x^2-8x=0$

$13x^2-8x-9=0$

$D=532$

$x_{1,2}=frac{8+-2sqrt{133}}{26}=frac{4+-sqrt{133}}{13}$