Question

помогите решить!!!!​

Answer 1

Ответ:

Объяснение:

$frac{4x^{2} +x}{3} -frac{x^{2}+17 }{9} =frac{5x-1}{6} |*18\6*(4x^{2} +x)-2*(x^{2} +17)=3*(5x-1)\24x^{2} +6x-2x^{2} -34=15x-3\22x^{2} -9x-31=0\D=2809;sqrt{D}=53\x_{1} ==1;x_{2} =frac{31}{22}.$

A)

$10x^{2} +4x+b=0\D=4^{2} -4*10*b=16-40b=0\16-40b=0\40b=16 |:40\b=0,4.$      

Б)

$2x^{2} +bx+8=0\D=b^{2} -4*2*8=0\b^{2}-64=0\b^{2} =64\b_{1,2} =frac{+}{-} 8.$