Question

2×(4x+1)=3(3x)






ME ajudaaaaaa​

Answer 1

Resposta:

x=2

Explicação passo-a-passo:

8x+2=9x

8x-9x= -2

-x= -2 .(-1)

x=2

Answer 2

Por meio da propriedade distributiva, elimine os parênteses:

$2x\cdot(4x+1)=3\cdot3x\\8x^2+2x=9x^2\\-x^2+2x+0=0\\\\\Delta=b^2-4\cdot a\cdot c\\\Delta=2^2-4\cdot(-1)\cdot0\\\Delta=4\\ \\\\x=\dfrac{-b\pm\sqrt{\Delta}}{2\cdot a}\\ \\\\x=\dfrac{-2\pm2}{2\cdot(-1)}\\ \\\\\\x'=\dfrac{-2-2}{-2}=\dfrac{-4}{-2}=2\\ \\ \\x''=\dfrac{-2+2}{-2}=0$

Bons estudos!