Question

(-1.75x+7/2)mũ 2 =100/49

Answer 1

`(-1,75x + 7/2) = 100/49`

`<=>` \(\left[{}\begin{matrix}-1,75x+\dfrac{7}{2}=\dfrac{10}{7}\\-1,75x+\dfrac{7}{2}=-\dfrac{10}{7}\end{matrix}\right.\)

`<=>` \(\left[{}\begin{matrix}x=\dfrac{58}{49}\\x=\dfrac{138}{49}\end{matrix}\right.\)

Answer 2

\(\left(-1.75.x+\dfrac{7}{2}\right)^2=\dfrac{100}{49}< =>\left(-75.x+\dfrac{7}{2}\right)^2=\left(\dfrac{10}{7}\right)^2< =>-75.x+\dfrac{7}{2}=\dfrac{10}{7}< =>-75.x=-\dfrac{29}{14}< =>x=\dfrac{29}{1050}\)